After some work with a file in the trigger guard area, I was able to seat the action properly and screw in everything correctly. The action not seating correctly was the root of a lot of problems.
The recuperator now fits and there are no issues in that department. I had to file off some of the lug on the rear of the handguard in order to get it to fit (and, of course, I caused a hair line crack by putting to much pressure).
The bands actually fit fairly well. Rear band is perfect, the front band and the band spring don't match up exactly, but it's nothing to make me stress about it.
I have two issues now that I may just have to live with. First, the hand guard is simply out of spec. It's not tall enough to sit over the barrel and not squeeze down the operating rod. I'm sure some of that pressure contributed to the hair like crack as well.
Second, either the stock's bayonet lug channel is too short or the apfetlor bayonet lug is too long (by approximately 3/8"). I'm afraid to file anything away here and it looks as if it will damage structural integrity. I would have to remove some of the lug and I have no experience with that sort of thing. Perhaps a project for a late date. In addition to the lug length, the handguard plays a factor too. Even if the lug/lug channel was correct length, it pushes the barrel up ever so slightly, and without any wiggle room in the handguard, it wouldn't work anyway.
For now, I'm content, as long as the handguard's crack does not worsen.