When the generation 4 glock 17/19 came out, I heard a lot of problems as far as the recoil spring was concerned. Ftf, fte etc.... my question is, does anyone know if these problems have been addressed? I plan on buying one from Neves, 398.00! Can't beat that price. Just wanted to know if the gen. 4 are fixed? I always ran generation 3. Any help would be appreciated. Thanks.