The largest B&W film processor that I knew of and personally used, was a Kreonite 305mm wide roller transport machine converted for B&W film processing.

These units were basically colour paper processors, the manufacturer re-arranged their reversal paper processor for B&W film processing.

We ran them at 24ºC.

I don't think film processing in a roller transport machine is that great an idea, one bit of crud on a roller and you can get a train track on your film. We processed a lot of 8x10" B&W film in those days and this was the easiest and cheapest way to do this, not to mention the quickest

We used dip and dunk for C41 and E6.

The Jobo system is possibly the most cost effective for the small user, however generally you trade operator time.

For outright quality, Jobo is very hard to beat, apart from loading film on reels, the film isn't handled again until it's ready to be hung up, or, in the case of colour, given the last bath by hand (wearing gloves) in a tray or jug.

Mick.