Having just left tray development for Unicolor/Chromega drums, I would suggest the very modest investment in a Uniroller and an 8x10 tank, in which you could do 4 4x5s with 4 oz. of chemicals. No problems with edge over-development, for which the hangers are infamous, and, like Jobo, the lights are on most of the time, with minimal drips. My negs have never looked so good, and the densitometer don't lie. My $.02.