But yeah, these are the problems I already forsee:
T-tracks: Where could I get some that are made of steel or aluminum that I can affix to the barrel shroud? All i've seen are plastic ones.
Hengstler counter: Not so much as a procurement issue (I can always find a way to snag one), but i'm more worried about the method of attaching it. Wouldn't glue melt off if the receiver got hot? I can see a method involving a hole being dirlled and tapped into the side, the counter affixed and held into place by a screw that is covered in Loctite and then ground down flush with the receiver, welded and finish dressed.
Everything else.. I could probably handle by myself or could pass off to a qualified gunsmith, such as affixing a proper scope base and the like.