I have finally found a way to use Patterson tanks on my Beseler Roller base. I have used a roller base for years with Jobo tanks to do all of my film processing. But Jobo tanks have recently become more valuable than gold. I have always used a 2500 series tank for 4x5 and smaller film. I recently got a Patterson tank, and i liked it. But the diameter was to small to make it work on my roller base. oh crap..... Well i got to thinking about using Patterson tanks now for everything. How do i make it work? Sewer pipe collar... 4inch pipe by 12 inches long, with a slot cut the length. Any size Patterson tank friction fits into this collar, and makes the diameter large enough to work on my roller base. Goodbye Jobo.... LOL LOL.