I'll vouch for Manchovie. All my guns have gone through him and they've always come out purring. Been working with him since I started airsoft (look at my join date).
Also a great troubleshooter and has an awesome imagination for custom builds. He can talk you out of doing stupid shit to your stuff. He's done hundreds of guns and knows his stuff.
Lastly, he's a really friendly guy. Easy communication, always a good conversation to be had. Ask him about Polish food, I always get free perogies and soup!
Contras A-06: F**k it, we'll do it live.