diff --git a/assets/text/TODO b/assets/text/TODO
index d539a72..efce91d 100644
--- a/assets/text/TODO
+++ b/assets/text/TODO
@@ -1,14 +1,15 @@
 1)  General {cleanup,refactor}
 2)  Transparent {back,fore}ground colour
-3)  Implement ANSI CSI CU[BDPU] sequences
-4)  Incremental auto{load,save} & {backup,restore}
-5)  Open and toggle a reference image in the background
-6)  Client-Server or Peer-to-Peer realtime collaboration
-7)  Arbitrary {format,palette}s ({4,8} bit ANSI/mIRC, etc.)
-8)  Hotkey & graphical interfaces to {composed,parametrised} tools
-9)  GUI: a) scrollbar b) switch from wxPython to GTK c) revisit About dialogue
-10) Layers, layout (e.g. for comics, zines, etc.) & asset management (e.g. kade, lion, etc.) & traits w/ {inserting,merging,linking}
-11) Sprites & scripted (Python?) animation on the basis of asset traits and {composable,parametrised} patterns (metric flow, particle system, rigging, ...)
+3)  Implement instrumentation & unit tests
+4)  Implement ANSI CSI CU[BDPU] sequences
+5)  Incremental auto{load,save} & {backup,restore}
+6)  Open and toggle a reference image in the background
+7)  Client-Server or Peer-to-Peer realtime collaboration
+8)  Arbitrary {format,palette}s ({4,8} bit ANSI/mIRC, etc.)
+9)  Hotkey & graphical interfaces to {composed,parametrised} tools
+10) GUI: a) scrollbar b) switch from wxPython to GTK c) revisit About dialogue
+11) Layers, layout (e.g. for comics, zines, etc.) & asset management (e.g. kade, lion, etc.) & traits w/ {inserting,merging,linking}
+12) Sprites & scripted (Python?) animation on the basis of asset traits and {composable,parametrised} patterns (metric flow, particle system, rigging, ...)
 13) Composition and parametrisation of tools from higher-order operators (brushes, filters, outlines, patterns & shaders) and unit tools; unit tools:
     a) geometric primitives (arrow, circle, cloud/speech bubble, curve, heart, hexagon, line, pentagon, polygon, rhombus, triangle, square, star)
     b) regions (crop, duplicate, erase, fill, invert, measure, pick, rotate, scale, select, shift, slice, tile, translate)
diff --git a/assets/tools/MiRCARTReduce.py b/assets/tools/MiRCARTReduce.py
index e28aa99..8993bc5 100755
--- a/assets/tools/MiRCARTReduce.py
+++ b/assets/tools/MiRCARTReduce.py
@@ -9,6 +9,7 @@ import os, sys
 [sys.path.append(os.path.join(os.getcwd(), "..", "..", path)) for path in ["libcanvas", "librtl"]]
 
 from CanvasImportStore import CanvasImportStore
+from CanvasExportStore import CanvasExportStore
 import sys
 
 def reduce(inPathName):
@@ -25,15 +26,17 @@ def reduce(inPathName):
                         print("\u001f", end="", file=outFile)
                     lastAttribs = inCurCell[2]
                 if  lastColours == None                     \
-                or  (lastColours[0] != inCurCell[:2][0]     \
-                and  lastColours[1] != inCurCell[:2][1]):
+                or  ((lastColours[0] != inCurCell[:2][0])   \
+                and  (lastColours[1] != inCurCell[:2][1]))  \
+                or  ((lastColours[0] == inCurCell[:2][0])   \
+                and  (lastColours[1] != inCurCell[:2][1])):
                     if (inCurCell[3] in set("0123456789")) and (inCurCell[1] < 10):
                         print("\u0003{:d},{:02d}{}".format(*inCurCell[:2], inCurCell[3]), end="", file=outFile)
                     else:
                         print("\u0003{:d},{:d}{}".format(*inCurCell[:2], inCurCell[3]), end="", file=outFile)
                     lastColours = inCurCell[:2]
-                elif (lastColours[1] == inCurCell[:2][1])   \
-                and  (lastColours[0] != inCurCell[:2][0]):
+                elif (lastColours[0] != inCurCell[:2][0])   \
+                and  (lastColours[1] == inCurCell[:2][1]):
                     if (inCurCell[3] in set("0123456789")) and (inCurCell[0] < 10):
                         print("\u0003{:02d}{}".format(inCurCell[0], inCurCell[3]), end="", file=outFile)
                     else:
diff --git a/assets/tools/MiRCARTToAnsi.py b/assets/tools/MiRCARTToAnsi.py
index 055ce39..fdf1c88 100755
--- a/assets/tools/MiRCARTToAnsi.py
+++ b/assets/tools/MiRCARTToAnsi.py
@@ -18,11 +18,11 @@ def main(*argv):
         print("usage: {} <MiRCART input file pathname>".format(sys.argv[0]), file=sys.stderr)
     else:
         canvasImportStore = CanvasImportStore()
-        rc, error = canvasImportStore.importAnsiFile(argv[1])
+        rc, error = canvasImportStore.importTextFile(argv[1])
         if rc:
             canvasExportStore = CanvasExportStore()
             canvasExportStore.exportAnsiFile(canvasImportStore.outMap, canvasImportStore.inSize, sys.stdout)
-        else
+        else:
             print("error: {}".format(error), file=sys.stderr)
 if __name__ == "__main__":
     main(*sys.argv)
diff --git a/libcanvas/CanvasExportStore.py b/libcanvas/CanvasExportStore.py
index 510acd4..fbfd4a3 100644
--- a/libcanvas/CanvasExportStore.py
+++ b/libcanvas/CanvasExportStore.py
@@ -125,7 +125,7 @@ class CanvasExportStore():
             outImgDraw = ImageDraw.Draw(outImg); outImgDraw.fontmode = "1";
             for inCurRow in range(len(canvasMap)):
                 for inCurCol in range(len(canvasMap[inCurRow])):
-                    inCurCell = canvasMap[inCurRow][inCurCol]; outColours = (0, 0);
+                    inCurCell = canvasMap[inCurRow][inCurCol]; outColours = [0, 0];
                     if inCurCell[2] & self._CellState.CS_BOLD:
                         if inCurCell[3] != " ":
                             if inCurCell[3] == "█":