I bought a new Air Arms TX200 in .177 caliber. Out of the box, it shot 13.7 fpe and rather snappy. I decided to install a Vortek 12 fpe kit to calm it down. When I first installed the kit, it shot 13.2 fpe. Not the results I desired, so, per Vortek's instructions, I cut a coil off the spring because it said I would get a 1.5 fpe reduction. Wellllll, no. It now shoots 12.6 fpe. I know I can take it apart and cut more off the spring, but it's rather annoying to do so. The gun really isn't broken in, per se. I have about 300 shots through it. The last 5 shots over the crhronograph gave 16 fps velocity spread and 5.6 SD. Am I expecting too much at this point? What is your experience in tuning these guns?