I'm about to build three stainless manifolds to replace our 21 year old brass ones and add tire cleaner. I'm using this thread and our old ones for reference. 3/8" HP line, 1/4" HP line for 400 psi spot free, tire cleaner w/air, and presoak w/air. We had our flat roof torn off and a 6/12 pitched roof installed so we now have a really nice attic with a heated, insulated wood trough on its floor. It is offset from center and will have a single 3/8" HP hose coming out the side going to the boom center. If injecting air into the PS and TC would 1/4 OD nylon tubing be sufficient or should I run 3/8 OD? We do have 2507 tips on the guns. Also anyone else have any photos of their manifolds? I'm trying to think of the best orientation and location of the fittings for easier repairs later on.