Plastic sheet to make HP-41C overlays

[tpugsley]

Hi all,
Maybe a dumb (obvious) question, but if one prints an overlay using a paper (or plastic) sheet, how do you cut out all the button rectangles?
My solution so far has been to use strips of removable tape running vertically between the buttons so I can still see all the original functions. Crude, but works for me.
Thanks (and forgive me if this has been covered, but I've never seen it).
Tom