I've got the old Wacom Serial 12" x 12" with pressure sensitive pens and a digitizing puck (I hope I still have them, anyway!) that I used to use to digitize KBD Matrices w/the puck in one of my CAD packages. The pen I used to capture script and swash detailing for signmaking using Fontographer a/o Freehand.
Never did like the pen/tablet combo for use as a general pointing device, so I never even tried to develop a command overlay. I used a Nostromo SpeedPad for programmed command keys w/my left hand and a mouse in the other. I found that combo much more efficient for doing any repetitive tasks, like reformatting/resizing/cropping etc. in GraphicConverter.
It worked out pretty well w/Flight SIMs too! [
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