I was lucky enough to find a used Lancaster AK built on a NoDak Spud receiver and the fit and finish was top quality and has ran great so far shooting Wolf ammo. It's my favorite BLM desert blaster. If I was in the market for a second AK - I'd look for another Lancaster.
The mag wobble varies from magazine to magazine. I've had pretty good luck with the 10/30 magazines I got from Solar Tactical.
The only issue with AK's is that I can't find affordable non-magnetic non-corrosive primed ammo to shoot at local SoCal ranges. Most brass cased non-magnetic and non-corrosive ammo I've seen runs about $0.60 cents or more per round.