Originally Posted by david b
I don't have an Xpan, I have a Russian Horizon. There is no carrier for it: 24x56 (or so). I bought a 35mm carrier for $15 on ebay and enlarged the opening for the Horizon's negs. Granted, I have a small home shop (drill press, etc.) and can use a few tools, but it isn't hard and took me, maybe, 30 minutes.
Drill out the bulk of the waste, cut the square corners with a hack saw (or hack saw blade in a jig saw) and file the edges to clean it up. Easy!
(the other David B.)