Hi Colin,

Not sure if this will work for you or not, but I have an old Cibachrome drum (both 8 x 10 and 11 x 14 tubes with end caps) and also have the motorized roller base to go with them. I've never processed film in a roller before so I don't know what the tube needs to be like.

BTW - just like the other Dan, I tray process all of my 8 x 10 negs (in pyro) and I don't have any problems with scratches. I've also tray processed 8 x 20 EFKE 100 film with no scratch problems.