Im planning a head to head comparison between my 25 Cricket and my 25 Veteran Long, Cricket is shooting the Kings @ 915fps and the Veteran shooting the MK2s @ 920fps. I already bought the plenum from Ernest, now I need to get a lighter spring valve, any clue where can I get it from besides Charlie F. I know it requires more modifications to boost up the power like porting the firing valve, more pre load on the hammer spring, elongate TP on the barrel. Any info where to get a lighter spring valve will be much appreciated! Thanks.