I want to put myself out as someone who made a poor comment a couple of years ago. The comment I made was outing vortex tune kits in a poor light because the multiple kits I purchased for my TX200’s did not make adverted velocity. Even though they do not, what I did get from my most used kit being in a TX200 .177 M3, is a rifle that makes about 13 ft/lbs has a remarkable smooth shot cycle with very little hold sensitivity. I have 6000 pellets though this kit and the velocity is very consistent (maybe 5 fps spread with a 20 shot string). No buzzing, no vibrations. Absolutely nothing to complain about. This has been an absolute outstanding purchase and I will only buy vortec tune kits for spring guns. And I owe vortec an apology for my earlier review. I have plans to buy a ProSport in the near future, and I will be purchasing a Vortec kit for this rifle.