I do the same thing, but I have a wire that zig-zags across the tank, this keeps the sheets from overlapping.
I'm working on a 5x7 solution that uses a 5-35mm Paterson tank and a piece of plastic to keep things separated. The 5x7 has to be taco'd length-wise instead of width-wise so the taller tank is needed. I just need to get my hands on a tank, which I'm going to do soon. For 4x5, I just taco them up in the little stainless steel I have with plastic, length-wise again, 3 to the tank. I can't wait to get my hands on a Mod54.
No idea what's going to happen next, but I'm hoping it involves being wrist deep in chemicals come the weekend.