Response to JOBO tank for manual sheet film processing

I've been using the Jobo 6 sheet unit for over a year now. I also use it for 120 and 35 mm film when I use PMK. The tank fills and drains quickly (regular capped lid, not the cog lid). Since I hand roll on the counter top, I made a sleeve out of 5/8" blue foam that slips snugly over the tank. This makes the diameter of the tank/sleeve about the same diameter as the lid and allows the tank to sit level. It also insulates and keeps the temperature more stable. 500ml fills the tank about half way and this is about the max that works well with rolling. I recently tried inversion agitation with 4x5 film with this tank and it worked quite well. 1.3 liters of developer just covers the top of the film reel and there is enough air space above that to permit the developer to move around during inversions. I used 10 sec/minute agitation (6 inversion cycles in 10 seconds) and the negatives came out perfect (FX15 diluted 1+2). For the stop (I use water) and fix processes, you can use roller agitation and use only 500 ml of solution.

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