I remember...... seems like umpteen years ago.. Martin....M08 did this kind of thing.
Funny, as soon as I started reading your post I was thinking, 'yeah, I remember Matt doing something like that'. I may have been that Faux Honor guard SKS he built up using an aluminum block he polished up on the butt stock, think it was supposed to be an East German set up as I recall.
Anyway, mostly concerned about the barrel threads, tolerances, and that sort of thing.