Thanks for all the replays and Q@EPM I will most likely be getting in touch with you. I forgot about this thread until today, I guess other projects have been keeping me busy.

I only use a gas lens unless it will not fit so that can be checked off the list and I have a back gas (purge setup) and would not think to do any project without.

I actually have a little header/ exhaust experiecne. I worked in an aircraft exhaust shop for a summer many moons ago (10 years now). I did not get to do much welding but I did alot of fabrication. Almost everything was made from 321 stainless (I meant 321 in the first post not 347, which is the filler for 321).