Gary-yes & yes. Stage 1 = 1/2 Trooper. Don't think I saw stage 1 in any posts, but then I didn't read all 400+ posts.
Skooter - yes, I have OCD, am anal-retentive, and being a retired engineer sure contributes to the pi.
I didn't look at what side (in or out) the baffle weld is, but if you do...