Tapped the valve for 1/8 NPT fitting, wasn't as centered as I want (off by two mm or so, but for doing it by hand it's not terrible)
However, now I have a leak coming from the powertube/valve seat area :/
So I e-mailed Lou, hopefully new parts fix the problem.
I also started to hack up the trigger frame to fit the 12 gram changer in. Needs to be widened, but should work nicely.