Nice work on the inserts. What are you planning to use to lock the inserts in place? I'm no expert in the field, but I've had (mostly) good luck with the Loctite Bearing and Sleeve (which is green). You mentioned Loctite green earlier. Is that the stuff you were referring to?
I also don't know how large of a gap it will deal with, but I have had situations where it cured on me with a half installed bearing race. I was using it as belt and suspenders on a reasonably well fitting bearing and I got it half pressed on and it flash cured and wouldn't go no more. Happened to me twice with the same pair of parts. I found the solution was to make the fit sloppier. I bet if I would RTFM, I would figure out what I was doing was a problem.
Point is... It would really suck for that to happen to you with a half-inserted spacer. Took me heat to get things apart again. Look into it maybe before you go for it? I don't think the bearing and sleeve retainer is intended to be wicking after assy. The green thread lock is, though.
Also... WD-40 - Worlds best cutting fluid for aluminum! Sorry, I'm rambling.