I decided to make a peek valve and a metal one piece poppet today to see if that would solve my slow leak about 150 bar in a week it was loosing since I went to peek poppet made the stem shorter than the original and mad the valve with about .005 smaller throat gun was set at about 910 fps at 125 bar reg setting everything is back together and no changes to the ssg or spring setting and didn't touch the reg getting about 920 fps now shot cycle sounds shorter to using 34 gr jsb huma reg and a 25 cc power plenum