Where are you guys buying foam for two color set ups? The prices on Amazon and Ebay are so high, it would cost more than I paid for my (used) Mac box to put foam in it.
I swapped my motor years ago from a 5hp lower rpm 3 phase motor to a similar power higher rpm single phase motor that I had laying around. I bought a pulley from Granger to match the effective rpm of the older motor, new belts, and bolted it right up. It's been running like that for ~3 years.
I hate to bump this from the depths, but I'm in the process of refreshing my old R15 (the tank is dated 1983, and it looks like it is original with the pump), and can't figure out what the small valves threaded into the valve manifolds are. My pump only has one on the high pressure cylinder...