Does Tim @ Mac1 sell a tiny regulator "test tank"?.... I thought I saw something like that in his Vendor gate.... maybe ask him?.... (or I could be dreaming)Bob
ahhhhhh.... then find somebody with a lathe that can drill and tap a 5/8"-18 NF hole in a piece of 1" CRS and machine a recess for the O-ring....Bob
Actually, filling the tank with BBs would probably work just fine, provided they were clean and free of oil.... I can't see a problem with it.... also, use the smallest tank you can get (13 CI)....Bob