I dont knwo how big the patterson tank is, but here is my method.
I have the stainless steel tanks for processing 2-3 35mm reels.
I simply place one or two sheets emulsion-side-in into the tank. The backside against the inside of the tank. Not taco'd like the above example. Then I fill the tank with only 125ml for one sheet or 200 for two.
Roll or roto-process the tank on its side.
The halation layer backing comes right off even though it is against the inside of the tank.
The only problem I have had is is the 2 sheets sometimes shift and end up over one another. I made a separator out of wire shaped like a W and now i dont have this problem again.
4x5 processing is really whatever works best for you.