My proton ice extreme was just serviced and now I am away from home and diving. There was an air leak between the V32 1st stage and the DIN connector. I unscrewed the DIN connector with a hex key and put oxygen compatible grease on the inner o-ring (OR 2050) and threads then screwed it back down. That seems to have cured it for the moment. But I am unsure of how far to screw down, not wanting to damage the reg. I do not want it to come loose again. Please advise.