Why don't you save yourself all the headache, and develop in a tray? I use tubes most of the time but plan on using trays for my 14x17, especially xray film as it has emulsion on both sides. I also use pyrocat-hd, and it works wonderfully in trays. The only reason I can see one not working in trays is that they do not have a dedicated darkroom, or that they don't like standing in the dark for long periods of time...