I learned of a James Maccari who builds tune kits for air guns, spoke to him on the phone and ordered a kit. He claims a much smoother shooting gun, much less recoil will be the result. The kit consists of a new spring, spring guide and a grease he calls tar. I forewarded the gun & kit to Tim at Mac 1 for installation and trigger work. Both James Maccari and mac 1 are on the web if anybody is interested. They claim it to be a totally different gun when it comes back, we'll see......DP