hi every one i got a leak from the best fittings reg tester the reg fits fine and perfect in the reg tester its just that the o ring supplyied by best fittings ( the one that comes with it) dosent seal the air i need a thicker o ring to be able to do for for reg tester with my raw tm1000 regulator..... the non x verson of the gun pre airforce gun ill incluse a pic and doens any one know what size of o ring ill need thats all im looking for is where to get or proper o ring for proper seal... thanks guys in advance