[schnautza]

I'm not sure if this simplifies or complicates things, but one dynamic stamp would be kind of cool to have. Give an option of how many strings (4, 6, or more) and have the stamp expand to accomodate. Then have fields that can be populated such as chord name to display above, and then type a string of numbers to tell the stamp what frets to mark, with x and o for unused or open strings. Also, possibly add another number to show if you are higher than the nut

For example,
E (o 2 2 1 o o)
Eb (x x 1 3 4 3)

I guess this would be it's own little mini-program. Probably not easy to implement.