Well Mike, I agree that loading this thing in a changing bag looks like it would be a real PITA. But for me, tank processing offers advantages in temperature control that I just find too difficult to maintain when working with open trays. The ambient temperature of my darkroom varies wildly as the seasons change. With open trays, so does the developer temperature. With tank processing, it's an easy thing to set the whole works into a tempering bath. I'm currently using an HP CombiPlan tank for 4x5 sheet film and I'm happy with it. For those who don't already have or for some reason don't like that tank, this device could offer an alternative. It should use about the same amount of chemistry as the HP, and while it is a bit more than you might need in an open tray, it is not terribly excessive.
Originally Posted by Mike Wilde