Great to hear you got it running, and that it isn’t overly loud with only the turbo for a muffler.   

I could actually imagine using it with only a pipe on it, but I'm committed to a muffler as I want a real quite airplane. I actually built a my own version of a SpinTech, but I made it 6x6x18 using .062 316SS and it turned out to weigh 14lbs. While it was a good exercise in muffler design, I will not use it, but will make another one 3x6x12 using .035 321SS.

  I’m pretty jealous.   

You're jealous? You're the one with the brand new TIG welder. I'm still jealous over that ;-)

S. Todd Bartrim
Turbo 13B rotary powered
RV-9endurance (FWF)
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

         "Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass".