I've been trying to assemble a set of roundy-bottom twin 38's for a while now. I picked up a set for $20 at a garage sale but one of the tanks failed hydro (they only have a born date of 1941. ). I have a mint NIB USD tapered thread dual manifold and new reducer bushings from McMaster-Carr.
I can either try and find a matching tank to complete the set (my preference) or find a single tapered valve to make a single 38 test bench air supply tank or ......? Not sure what I want to do but I figured if I threw my predicament out into the universe some alien lifeform would respond. Mark