I have been told it is possible to make a 35mm full-frame negative carrier by sandwiching two pieces of matte board together and cutting an appropriately sized hole in the middle. Has anyone tried this? Or anything else that has worked? I have a Beseler 23C enlarger, and the list price for the full-frame 35mm neg. carrier is $125 Canadian. I'm looking for an option which might be more frugal, but I don't really want to compromise on quality (ie. sharp edge), so I'll spend the money if I have to, but I thought I'd check for other ideas first.