[Colin Corneau]

I had Steve Grimes machine a 6 X 12 opening in one of my Omega 6 X 6 negative carriers. It works fine.

I did this same thing, with both a 6x6 neg carrier, and a 35mm carrier for my Widelux and XPan negs.

I used a plasma torch, via a friendly teacher at a local high school. Filed and sanded it down myself...works great.