I'm planning something similar, but I'll be making something along the lines of O'lane's phantom trigger groups to move the trigger back and allow the body to sit more forward in the stock for cleaner air line routing.
I won't judge that guy's mod not knowing what kind of tools he had... I mean, it's not something I'd be satisfied with but I'm one of the lucky few with pretty much unfettered access to a Bridgeport. So what if I hardly know how to use it!
Trawling Ebay right now for cheap 10-22 stocks. If I could build the whole thing for less than $300 it would make me a very happy camper (including adjustable riser and optic). I got my Hammer7 brand new in box from a member here for $115 shipped, so if I can keep the stock under $60 I think I can pull it off with the stuff I have laying around the shop.