I processed a sheet of 4x5 in a 4-reel stainless tank the other day in a water bath @ 101deg F.
I'd imagine that if you wanted to, you could do it for b/w as well. I don't have access to 4x5 tanks for developing at school for color. B/W only, and thats in trays.
worked for me, I just made sure to give it random movement, side to side and rolling back and forth, rotating ends every 30 sec or so.