OK I've succumbed a second time and own a plate camera.

Anyone here tried cutting down 4x5" film to 9x12cm format? I was thinking to buy a roller blade paper cutter and fashion some stops so I can cut film in the dark. I have some 4x5 ortho film I can experiment with using the safelight on too.

I have enough 4x5" film laying around unused that I simply don't want to purchase 9x12cm film new. Any guidance would be appreciated.