I would have posted this in the fx-1 section, but that area doesnt seem to get too much traffic. I know of 2 different people that have b pipes for a B1 that I can get ahold of for decent prices. I have also been reading that the B1 mod chamber hits harder than a sj chamber. My question is has anyone fit one of these B1 chambers into a Fx-1? My brothers SN has a B1 chamber in it and it seems to fit better than the last SJ mod chamber I had in my last SN I built. My chamber rubbed really bad where his doesnt seem to rub the hull at all.