Thinking of buying barely used ground glass with grid and 6x5, 6x7 indicators. C amera currently has glass with square corners, but barely used one has cut corne rs.

Any problems with that - other than I can't check focus all the way into the cor ners?

BTW: this forum is incredibly helpful! The fast and kind responses to utter rook ies like me is making my 1st week with 4x5 far easier.