To edit the data files and add the coding for Duo Art style stop management,  there needs to be some kind of tally system, as the roll progresses, to keep track of the what is "on" or "off".  A tally system developed for this project resembles a spreadsheet.  The far left column represents the sixty Duo Art codes.  The top row heading is the position within the roll that the code is applied.  Filling in the cells of the spreadsheet, which are about 1/4 inch square, with colored markers (green for on and red for off), keeps track of the stop changes printed on the roll.  A third color is used when the "Tonal" pedal is called for.  (Aeolian called the crescendo pedal, "Tonal")  One needs to think of the Tonal as superimposing stops on top of those already drawn.  The tally becomes extremely complex as stops are added or subtracted while the Tonal is on. A scheme of marking those events, which are delayed until the Tonal no longer is superimposed, is to merely put a circle around the change codes affected.