Watching close.
This has been a side project of mine as well, trying to get a Surefire 3-prong, and SOCOM762RC to work with my Underfolder M92.
Set it aside when I've got some concentricity issues with the use of a check nut. Trying something different soon, cutting the barrel and indexing off the crown. We'll see how it works...
KNS piston will be a 'must have', IMO.
Fingers crossed.