need some info

ty for any advise………….now making tp9 into a tp45 with eldys big bore kits ………I know some of you out there insist on accuracy …..no problem at all with 357…………now I need to know what mods I can do to make this gun more powerfull………………need to push 457 rounds……………iseen pandemic vids…. and would like to know..how much more fps u can get from t.t one piece top hat….. and also how much more fps more you can get from t.t heavy hammer…will the top hat give more power then the direct flo valve? what are some other mods that can be done? eldy has great product and I want to push it to the limit any info……also does anyone have a link to trigger assembaly thanks