How is it that half the world has 12FPE limit or less and here in the US it next to impossible to get springer tuned to it. No one has a TX200 kit in stock and there is lots of talk about the springs not lasting. The pistons have grown to 26mm. Walther imports a 17FPE version. Walther 12FPE 177( that we cant get) has the wrong Port size. Has the world forgotten how to build a good 12FPE gun