I've know some rather obsessive friends who after exhaustive (one year) testing, gray cards, densitometers, etc., concluded the only even processing of sheet films was with a soft paint brush loaded with developer applied from one end.
I did say obsessive, right?
We used tray processing, with developers that required shorter times. We also used the big block tanks that took a lot of soup and processed a dozen sheets, probably in Dk60a, back in the day. Oh, and the dip tanks, I once had a stainless steel set with water bath for Ektachrome-- about two moves ago.
Roger, the Czechs copied the Linhof holders, for the next time you are having a pint in Prague. Found some NIB at Skoda Foto in the used department.
It used to be an adventure there, outfitted Zu with an entire darkroom, had a Taxi to the door, and Bob's your Uncle, she quickly had her own set up, Meopta 6x9 and the works, less than a Benjamin with tax and tip.
Used to have a lot of new and used Jobo kit, some still in storage if I decide to go back and soup some film.
Unfortunately, you don't see much darkroom gear at the shows, there is a current revival attempt at some rental space with classes downtown on Superior Ave. , Igor, myself, and a few others try to help them out when we see gear. If you see gear at a show now, it is often left in the room when the vendor departs without selling it.
Regards, John