Can anyone with experience share their methods? Having never done it before, my first idea would be to use my Beseler Rotatrim, as follows:
1) tape a piece of mat board in place as a stop for the 7" cut
2) go dark, make all of the 7" cuts then put the film back in the box
3) move the mat board and tape it in place for the 5" cut
4) go dark and make all of the 5" cuts
Buying a pair of infrared goggles for $400 seems a bit extreme, but I might have to resort to it. Making inaccurate cuts could get even more expensive.
What about the loss of the notches on some of the cut-down sheets? Seems a little scary not to have a way of orienting the film in the dark. Is anybody notching their cut-down sheets with a punch?
A major disadvantage of this cutting-down strategy is that it does not allow me to order film when I am on the road shooting, unless I can find a darkroom.