So I finally pulled the oring from the back half of the tank as suggests by HUMA. Sure enough the minute I start to fill the tank air was pissing out the threads. Now one would think replace huma oring so I did, and I made sure that when screwing on tank end that the regulator was all the way back. Start to fill air leaks out, So enough I put the rear o-ring back in.
So I decided to try something else.
I installed Huma set to 140, put in and left rear tank o-ring in.
The delron seal between tank and factory regulator is .081 thick, and as well does not fill the entire diameter it sits in. It has about a thousand or two space, I machined one flt the circle tightly in diameter and I increased the thickness to .085. I put all belville in same direction and cranked down the factory reg screw, this bridges the 2 regulators and with no pin the old one really does nothing now. Did a little valve work, Filled tank to capacity, took her over to my gunsmith to do some chrony and see if it is still leaking.
NO leaks! and after a few minor hammer spring adjustment she hitting an average 736fps w a benjamin 14.3g, ,this pistol now rocks, I did not need to leave the o-ring out, bridging the regulators seemed to do the trick and gave it a lot of power I was only getting 650s before with the same pellet and hammer spring settings. The delron made a much better seal at .085 than the factory and increasing diameter a bit helped seal the edges of old reg. The bark is not overly loud but enough to warrant a ldc.
