Just completed my backyard sniper. I probably spent 3x from what I started. With all the mods, she now shoots 704fps with 7.9 CPHP with 10 pumps before I installed the power adjuster (not pictured) with 20 pumps I got 2 shots 1st was 642fps and 2nd was 732fps. After the power adjuster, with 20 pumps It shot 857fps. I added the power adjuster so I don't have to use a heavy hammer spring to dump app the air with 20+ pumps, I also have lighten the valve spring to make it easier to pump. I only pump her to 12 to minimize wear and tear on me old wrist!!