Good Afternoon, Barry,

While I have considerable admiration for those who have the skill and patience to use tray processing without getting unevenly-developed or damaged negatives, my recommendation (as many APUG members who recall my previous posts on this topic will remember) is a Chromega 8 x 10 color processing drum. It comes with separating ribs and a spacer; it's cheap, doesn't leak, requires only minimal chemical amounts, and makes 4 x 5 processing virtually foolproof. The only drawbacks are 1)four-sheet-at-a-time limitation and 2)incompatibility with stand or semi-stand processing, neither of which normally affects me.