Why not both? A tag with several different ratings. Maybe 3 or 4 levels - Basic (v2 & v3), advanced aeg(blowback, All versions mechbox, lipo ready,full builds.) PTW, GBB.
Who is this singular hack that everyone is referring to? Better not be me.
On Brian's scale, I think I'd fit somewhere between doc and technician.
Having 10 guys with at least 2 years in vouch for you would be appropriate.
It would be good for the doc's business and good for the community. Too many people think they can build a gun. Even if you are mechanically inclined and well-reserched, there are alot of things that come from experience.
A good gun doc has already made their expensive mistakes on their own guns.
Grand Poobah of T.W.A.T.