Hello everybody, I would like to know your opinion for this airgun. I love the AA S400-500, and I would like to use it mainly for HFT and FT. I think that Xtra Fac models give me the chance to change the power when I need with a lot of consistence in shoots velocity. This way I can shoot in 16J and 21J. What do you think about the S400-500 Xtra Fac in .177 for FT and HFT? Is S400-500 Classic better balanced for this use? Thanks for your reply.