Sorry Radcom, I didn't want to imply anything... what seems obvious to some of us somehow eludes others

It must have been the wrong O ring in the right package... I've replaced a few magnum O rings my self for the 46 and 52... everyone fit in the valve body just fine. If your down waiting for a new O ring try the fuel tube trick... I've found it works better on the magnums than the O ring, lasts longer and can be repaired at the field... a set of forceps/ fine needle nose pliers helps slip the fuel tube over the NV assembly.

John