Hi Guys, I have a Impact X 25 cal 700mm barrel that I have done several mods too including boring the removable valve seat to 6.3mm or a 1/4 inch. I have the plenum from Poland That's been working well, Huma dual port TP and Huma regulator. Is there any benefit in replacing the valve housing with a newer 1 piece? Is the seat larger and what parts would I need to go with it. And, can it be modified? Thanks,,