I have a line on a length of grey PVC-U thinwall for air ducting applications, it will be able to handle 33"x43" so it should work well with up to 42" rolls. It is opaque and fairly light too so with it being 10.75 instead of my 3063's 8" diameter, it might even work with my Beseler motor base. Denise mentions not doing a pre-wet for reasons of uneven development but I do it in my 3063 and find it promotes even development....?

I like using the 3063 for 20x24 so much that making the next size up seemed a no brainer.
This should be a fun project...