diff --git a/4ed_file_view.cpp b/4ed_file_view.cpp
index adfcbba0..d865b61d 100644
--- a/4ed_file_view.cpp
+++ b/4ed_file_view.cpp
@@ -11,6 +11,8 @@
 
 #include "buffer/4coder_shared.cpp"
 #include "buffer/4coder_gap_buffer.cpp"
+
+#define Buffer_Type Gap_Buffer
 #include "buffer/4coder_buffer_abstract.cpp"
 
 struct Range{
@@ -2418,15 +2420,15 @@ view_do_single_edit(Mem_Options *mem, File_View *view, Editing_File *file,
     
     i32 start = spec.step.edit.start;
     i32 end = spec.step.edit.end;
-    char *str = (char*)spec.str;
+    char *str = (char*)spec.str; AllowLocal(str);
     i32 str_len = spec.step.edit.len;
     
-    i32 shift_amount;
+    i32 shift_amount = 0;
+#if BUFFER_EXPERIMENT_SCALPEL
     while (gap_buffer_replace_range(&file->buffer, start, end, str, str_len, &shift_amount))
         file_grow_as_needed(general, file, shift_amount);
     
     // NOTE(allen): fixing stuff afterwards
-#if BUFFER_EXPERIMENT_SCALPEL
     if (file->tokens_exist)
         file_relex_parallel(mem, file, start, end, shift_amount);
 #endif
diff --git a/4ed_file_view_golden_array.cpp b/4ed_file_view_golden_array.cpp
index a1575347..2f96aa8c 100644
--- a/4ed_file_view_golden_array.cpp
+++ b/4ed_file_view_golden_array.cpp
@@ -11,6 +11,8 @@
 
 #include "buffer/4coder_shared.cpp"
 #include "buffer/4coder_golden_array.cpp"
+
+#define Buffer_Type Buffer
 #include "buffer/4coder_buffer_abstract.cpp"
 
 struct Range{
diff --git a/buffer/4coder_buffer_abstract.cpp b/buffer/4coder_buffer_abstract.cpp
index 9916f875..4a931067 100644
--- a/buffer/4coder_buffer_abstract.cpp
+++ b/buffer/4coder_buffer_abstract.cpp
@@ -4,7 +4,7 @@
  *
  * public domain -- no warranty is offered or implied; use this code at your own risk
  * 
- * 16.10.2015
+ * 24.10.2015
  * 
  * Buffer data object
  *  type - Golden Array
@@ -13,12 +13,6 @@
 
 // TOP
 
-#if BUFFER_EXPERIMENT_SCALPEL
-#define Buffer_Type Buffer
-#else
-#define Buffer_Type Gap_Buffer
-#endif
-
 #define CAT_(a,b) a##b
 #define CAT(a,b) CAT_(a,b)
 
@@ -335,6 +329,7 @@ buffer_get_line_index(Buffer_Type *buffer, int pos, int l_bound, int u_bound){
     return(start);
 }
 
+#ifndef NON_ABSTRACT_PORTION_4TECH
 internal_4tech int
 buffer_get_line_index_from_wrapped_y(float *wraps, float y, float font_height, int l_bound, int u_bound){
     int start, end, i, result;
@@ -355,19 +350,7 @@ buffer_get_line_index_from_wrapped_y(float *wraps, float y, float font_height, i
     }
     return(result);
 }
-
-inline_4tech Full_Cursor
-make_cursor_hint(int line_index, int *starts, float *wrap_ys, float font_height){
-    Full_Cursor hint;
-    hint.pos = starts[line_index];
-    hint.line = line_index + 1;
-    hint.character = 1;
-    hint.unwrapped_y = (f32)(line_index * font_height);
-    hint.unwrapped_x = 0;
-    hint.wrapped_y = wrap_ys[line_index];
-    hint.wrapped_x = 0;
-    return(hint);
-}
+#endif
 
 internal_4tech Full_Cursor
 buffer_cursor_from_pos(Buffer_Type *buffer, int pos, float *wraps,
@@ -537,5 +520,8 @@ buffer_get_render_data(Buffer_Type *buffer, float *wraps, Buffer_Render_Item *it
                            width, height, advance_data, stride, font_height);
 }
 
+#ifndef NON_ABSTRACT_PORTION_4TECH
+#define NON_ABSTRACT_PORTION_4TECH 1
+#endif
 // BOTTOM
 
diff --git a/buffer/4coder_gap_buffer.cpp b/buffer/4coder_gap_buffer.cpp
index b160353e..3e115320 100644
--- a/buffer/4coder_gap_buffer.cpp
+++ b/buffer/4coder_gap_buffer.cpp
@@ -291,12 +291,5 @@ buffer_cursor_seek(Gap_Buffer *buffer, Buffer_Seek seek, float max_width, float
     return(state.cursor);
 }
 
-// TODO(allen): unfinished below here
-
-internal_4tech int
-gap_buffer_replace_range(Gap_Buffer *buffer, int start, int end, char *str, int len, int *shift_amount){
-    return(0);
-}
-
 // BOTTOM
 
diff --git a/buffer/4coder_golden_array.cpp b/buffer/4coder_golden_array.cpp
index 17842cdd..68f0cd4b 100644
--- a/buffer/4coder_golden_array.cpp
+++ b/buffer/4coder_golden_array.cpp
@@ -128,26 +128,6 @@ buffer_stringify(Buffer *buffer, int start, int end, char *out){
     }
 }
 
-#if 0
-internal_4tech void
-buffer_measure_wrap_y(Buffer *buffer, float *wraps,
-                      float font_height, float max_width){
-    float *widths;
-    float y_pos;
-    int i, line_count;
-
-    line_count = buffer->line_count;
-    widths = buffer->line_widths;
-    y_pos = 0;
-
-    for (i = 0; i < line_count; ++i){
-        wraps[i] = y_pos;
-        if (widths[i] == 0) y_pos += font_height;
-        else y_pos += font_height*ceil_4tech(widths[i]/max_width);
-    }
-}
-#endif
-
 internal_4tech int
 buffer_replace_range(Buffer *buffer, int start, int end, char *str, int len, int *shift_amount){
     char *data;
@@ -170,83 +150,6 @@ buffer_replace_range(Buffer *buffer, int start, int end, char *str, int len, int
     return(result);
 }
 
-typedef struct{
-    int pos, index;
-} Cursor_With_Index;
-
-inline_4tech void
-write_cursor_with_index(Cursor_With_Index *positions, int *count, int pos){
-    positions[*count].index = *count;
-    positions[*count].pos = pos;
-    ++*count;
-}
-
-#define CursorSwap__(a,b) { Cursor_With_Index t = a; a = b; b = t; }
-
-internal_4tech void
-buffer_quick_sort_cursors(Cursor_With_Index *positions, int start, int pivot){
-    int i, mid;
-    int pivot_pos;
-    
-    mid = start;
-    pivot_pos = positions[pivot].pos;
-    for (i = mid; i < pivot; ++i){
-        if (positions[i].pos < pivot_pos){
-            CursorSwap__(positions[mid], positions[i]);
-            ++mid;
-        }
-    }
-    CursorSwap__(positions[mid], positions[pivot]);
-    
-    if (start < mid - 1) buffer_quick_sort_cursors(positions, start, mid - 1);
-    if (mid + 1 < pivot) buffer_quick_sort_cursors(positions, mid + 1, pivot);
-}
-
-inline_4tech void
-buffer_sort_cursors(Cursor_With_Index *positions, int count){
-    assert_4tech(count > 0);
-    buffer_quick_sort_cursors(positions, 0, count-1);
-}
-
-internal_4tech void
-buffer_quick_unsort_cursors(Cursor_With_Index *positions, int start, int pivot){
-    int i, mid;
-    int pivot_index;
-    
-    mid = start;
-    pivot_index = positions[pivot].index;
-    for (i = mid; i < pivot; ++i){
-        if (positions[i].index < pivot_index){
-            CursorSwap__(positions[mid], positions[i]);
-            ++mid;
-        }
-    }
-    CursorSwap__(positions[mid], positions[pivot]);
-    
-    if (start < mid - 1) buffer_quick_unsort_cursors(positions, start, mid - 1);
-    if (mid + 1 < pivot) buffer_quick_unsort_cursors(positions, mid + 1, pivot);
-}
-
-#undef CursorSwap__
-
-inline_4tech void
-buffer_unsort_cursors(Cursor_With_Index *positions, int count){
-    assert_4tech(count > 0);
-    buffer_quick_unsort_cursors(positions, 0, count-1);
-}
-
-internal_4tech void
-buffer_update_cursors(Cursor_With_Index *sorted_positions, int count, int start, int end, int len){
-    Cursor_With_Index *position;
-    int shift_amount;
-    
-    shift_amount = (len - (end - start));
-    
-    position = sorted_positions + count - 1;
-    for (; position >= sorted_positions && position->pos >= end; --position) position->pos += shift_amount;
-    for (; position >= sorted_positions && position->pos >= start; --position) position->pos = start;
-}
-
 internal_4tech Full_Cursor
 buffer_cursor_seek(Buffer *buffer, Buffer_Seek seek, float max_width, float font_height,
                    void *advance_data, int stride, Full_Cursor cursor){
@@ -337,44 +240,6 @@ buffer_invert_batch(Buffer_Invert_Batch *state, Buffer *buffer, Buffer_Edit *edi
     return(result);
 }
 
-internal_4tech int
-buffer_batch_debug_sort_check(Buffer_Edit *sorted_edits, int edit_count){
-    Buffer_Edit *edit;
-    int i, result, start_point;
-    
-    result = 1;
-    start_point = 0;
-    
-    edit = sorted_edits;
-    for (i = 0; i < edit_count; ++i, ++edit){
-        if (start_point > edit->start){
-            result = 0; break;
-        }
-        start_point = (edit->end < edit->start + 1)?edit->start + 1:edit->end;
-    }
-    
-    return(result);
-}
-
-internal_4tech int
-buffer_batch_edit_max_shift(Buffer_Edit *sorted_edits, int edit_count){
-    Buffer_Edit *edit;
-    int i, result;
-    int shift_total, shift_max;
-    
-    result = 0;
-    shift_total = 0;
-    shift_max = 0;
-    
-    edit = sorted_edits;
-    for (i = 0; i < edit_count; ++i, ++edit){
-        shift_total += (edit->len - (edit->end - edit->start));
-        if (shift_total > shift_max) shift_max = shift_total;
-    }
-    
-    return(shift_max);
-}
-
 typedef struct{
     int i;
     int shift_total;
@@ -417,41 +282,6 @@ buffer_batch_edit(Buffer *buffer, Buffer_Edit *sorted_edits, char *strings, int
     assert_4tech(result == 0);
 }
 
-internal_4tech void
-buffer_batch_edit_update_cursors(Cursor_With_Index *sorted_positions, int count, Buffer_Edit *sorted_edits, int edit_count){
-    Cursor_With_Index *position, *end_position;
-    Buffer_Edit *edit, *end_edit;
-    int start, end;
-    int shift_amount;
-    
-    position = sorted_positions;
-    end_position = sorted_positions + count;
-    
-    edit = sorted_edits;
-    end_edit = sorted_edits + edit_count;
-    
-    shift_amount = 0;
-    
-    for (; edit < end_edit && position < end_position; ++edit){
-        start = edit->start;
-        end = edit->end;
-        
-        for (; position->pos < start && position < end_position; ++position){
-            position->pos += shift_amount;
-        }
-        
-        for (; position->pos < end && position < end_position; ++position){
-            position->pos = start + shift_amount;
-        }
-        
-        shift_amount += (edit->len - (end - start));
-    }
-    
-    for (; position < end_position; ++position){
-        position->pos += shift_amount;
-    }
-}
-
 internal_4tech int
 buffer_find_hard_start(Buffer *buffer, int line_start, int *all_whitespace, int *all_space,
                        int *preferred_indent, int tab_width){
@@ -485,23 +315,7 @@ buffer_find_hard_start(Buffer *buffer, int line_start, int *all_whitespace, int
 
 internal_4tech void
 buffer_eol_convert_in(Buffer *buffer){
-    char *data;
-    int size;
-    int i;
-    
-    data = buffer->data;
-    size = buffer->size;
-    assert_4tech(size < buffer->max);
-    data[size] = 0;
-    
-    for (i = 0; i < size; ++i){
-        if (data[i] == '\r' && data[i+1] == '\n'){
-            memmove_4tech(data + i, data + i + 1, size - i);
-            size -= 1;
-        }
-    }
-    
-    buffer->size = size;
+    buffer->size = eol_convert_in(buffer->data, buffer->size);
 }
 
 inline_4tech int
@@ -513,23 +327,9 @@ buffer_eol_convert_out_size(Buffer *buffer){
 
 internal_4tech void
 buffer_eol_convert_out(Buffer *buffer){
-    char *data;
     int size;
-    int i;
-    
-    data = buffer->data;
-    size = buffer->size;
     assert_4tech(buffer_eol_convert_out_size(buffer) < buffer->max);
-    
-    for (i = 0; i < size; ++i){
-        if (data[i] == '\n'){
-            memmove_4tech(data + i + 1, data + i, size - i);
-            data[i] = '\r';
-            ++i;
-            ++size;
-        }
-    }
-    
+    eol_convert_out(buffer->data, buffer->size, buffer->max, &size);
     buffer->size = size;
 }
 
diff --git a/buffer/4coder_shared.cpp b/buffer/4coder_shared.cpp
index 59816c2b..941d7c81 100644
--- a/buffer/4coder_shared.cpp
+++ b/buffer/4coder_shared.cpp
@@ -134,6 +134,19 @@ write_render_item_inline(Buffer_Render_Item *item, int index, int glyphid,
     return(ch_width);
 }
 
+inline_4tech Full_Cursor
+make_cursor_hint(int line_index, int *starts, float *wrap_ys, float font_height){
+    Full_Cursor hint;
+    hint.pos = starts[line_index];
+    hint.line = line_index + 1;
+    hint.character = 1;
+    hint.unwrapped_y = (f32)(line_index * font_height);
+    hint.unwrapped_x = 0;
+    hint.wrapped_y = wrap_ys[line_index];
+    hint.wrapped_x = 0;
+    return(hint);
+}
+
 typedef struct{
     Full_Cursor cursor, prev_cursor;
 } Seek_State;
@@ -245,6 +258,192 @@ cursor_seek_step_end:
     return(result);
 }
 
+typedef struct{
+    int pos, index;
+} Cursor_With_Index;
+
+inline_4tech void
+write_cursor_with_index(Cursor_With_Index *positions, int *count, int pos){
+    positions[*count].index = *count;
+    positions[*count].pos = pos;
+    ++*count;
+}
+
+#define CursorSwap__(a,b) { Cursor_With_Index t = a; a = b; b = t; }
+
+internal_4tech void
+buffer_quick_sort_cursors(Cursor_With_Index *positions, int start, int pivot){
+    int i, mid;
+    int pivot_pos;
+    
+    mid = start;
+    pivot_pos = positions[pivot].pos;
+    for (i = mid; i < pivot; ++i){
+        if (positions[i].pos < pivot_pos){
+            CursorSwap__(positions[mid], positions[i]);
+            ++mid;
+        }
+    }
+    CursorSwap__(positions[mid], positions[pivot]);
+    
+    if (start < mid - 1) buffer_quick_sort_cursors(positions, start, mid - 1);
+    if (mid + 1 < pivot) buffer_quick_sort_cursors(positions, mid + 1, pivot);
+}
+
+internal_4tech void
+buffer_quick_unsort_cursors(Cursor_With_Index *positions, int start, int pivot){
+    int i, mid;
+    int pivot_index;
+    
+    mid = start;
+    pivot_index = positions[pivot].index;
+    for (i = mid; i < pivot; ++i){
+        if (positions[i].index < pivot_index){
+            CursorSwap__(positions[mid], positions[i]);
+            ++mid;
+        }
+    }
+    CursorSwap__(positions[mid], positions[pivot]);
+    
+    if (start < mid - 1) buffer_quick_unsort_cursors(positions, start, mid - 1);
+    if (mid + 1 < pivot) buffer_quick_unsort_cursors(positions, mid + 1, pivot);
+}
+
+#undef CursorSwap__
+
+inline_4tech void
+buffer_sort_cursors(Cursor_With_Index *positions, int count){
+    assert_4tech(count > 0);
+    buffer_quick_sort_cursors(positions, 0, count-1);
+}
+
+inline_4tech void
+buffer_unsort_cursors(Cursor_With_Index *positions, int count){
+    assert_4tech(count > 0);
+    buffer_quick_unsort_cursors(positions, 0, count-1);
+}
+
+internal_4tech void
+buffer_update_cursors(Cursor_With_Index *sorted_positions, int count, int start, int end, int len){
+    Cursor_With_Index *position;
+    int shift_amount;
+    
+    shift_amount = (len - (end - start));
+    
+    position = sorted_positions + count - 1;
+    for (; position >= sorted_positions && position->pos >= end; --position) position->pos += shift_amount;
+    for (; position >= sorted_positions && position->pos >= start; --position) position->pos = start;
+}
+
+internal_4tech int
+buffer_batch_debug_sort_check(Buffer_Edit *sorted_edits, int edit_count){
+    Buffer_Edit *edit;
+    int i, result, start_point;
+    
+    result = 1;
+    start_point = 0;
+    
+    edit = sorted_edits;
+    for (i = 0; i < edit_count; ++i, ++edit){
+        if (start_point > edit->start){
+            result = 0; break;
+        }
+        start_point = (edit->end < edit->start + 1)?edit->start + 1:edit->end;
+    }
+    
+    return(result);
+}
+
+internal_4tech int
+buffer_batch_edit_max_shift(Buffer_Edit *sorted_edits, int edit_count){
+    Buffer_Edit *edit;
+    int i, result;
+    int shift_total, shift_max;
+    
+    result = 0;
+    shift_total = 0;
+    shift_max = 0;
+    
+    edit = sorted_edits;
+    for (i = 0; i < edit_count; ++i, ++edit){
+        shift_total += (edit->len - (edit->end - edit->start));
+        if (shift_total > shift_max) shift_max = shift_total;
+    }
+    
+    return(shift_max);
+}
+
+internal_4tech void
+buffer_batch_edit_update_cursors(Cursor_With_Index *sorted_positions, int count, Buffer_Edit *sorted_edits, int edit_count){
+    Cursor_With_Index *position, *end_position;
+    Buffer_Edit *edit, *end_edit;
+    int start, end;
+    int shift_amount;
+    
+    position = sorted_positions;
+    end_position = sorted_positions + count;
+    
+    edit = sorted_edits;
+    end_edit = sorted_edits + edit_count;
+    
+    shift_amount = 0;
+    
+    for (; edit < end_edit && position < end_position; ++edit){
+        start = edit->start;
+        end = edit->end;
+        
+        for (; position->pos < start && position < end_position; ++position){
+            position->pos += shift_amount;
+        }
+        
+        for (; position->pos < end && position < end_position; ++position){
+            position->pos = start + shift_amount;
+        }
+        
+        shift_amount += (edit->len - (end - start));
+    }
+    
+    for (; position < end_position; ++position){
+        position->pos += shift_amount;
+    }
+}
+
+internal_4tech int
+eol_convert_in(char *data, int size){
+    int i;
+    
+    for (i = 0; i < size; ++i){
+        if (data[i] == '\r' && data[i+1] == '\n'){
+            memmove_4tech(data + i, data + i + 1, size - i);
+            size -= 1;
+        }
+    }
+    
+    return(size);
+}
+
+internal_4tech int
+eol_convert_out(char *data, int size, int max, int *size_out){
+    int result;
+    int i;
+    
+    // TODO(allen): iterative memory check
+    result = 1;
+    i = 0;
+    
+    for (; i < size; ++i){
+        if (data[i] == '\n'){
+            memmove_4tech(data + i + 1, data + i, size - i);
+            data[i] = '\r';
+            ++i;
+            ++size;
+        }
+    }
+    
+    *size_out = size;
+    return(result);
+}
+
 inline_4tech int
 is_whitespace(char c){
     int result;
diff --git a/win32_4ed.cpp b/win32_4ed.cpp
index 4417e0ab..0357ce68 100644
--- a/win32_4ed.cpp
+++ b/win32_4ed.cpp
@@ -54,7 +54,7 @@
 #define FPS 30
 #define FRAME_TIME (1000000 / FPS)
 
-#define BUFFER_EXPERIMENT_SCALPEL 0
+#define BUFFER_EXPERIMENT_SCALPEL 1
 
 #include "4ed_meta.h"