I have access to a lathe so tomorrow I'm going to try and cut down the couplings that hold the orific and widen the reducers (someting I thought about doing when putting them together originally) along with pulling them out further. As far as the chamber goes its dementions are 6"T x 6"W x 17"L on the inside. If that dosent work then I'll revert to frostys T burner plans