Cutting down film is easy if you are reasonably careful as frotog says.

I cut 16x20 down to 8x20 on my C&H mat cutter.
Never a problem.

A simple jig made from matboard and a dime-store paper punch makes film notching easy.
Never a problem.

Turning down a Deardorff ???
Now thaaaat's a problem...

Reinhold

www.classicBWphoto.com