I removed the "do not disassemble" bolt on non drive side, it was not screwed on that tight, threads look ok, reassembled with some thread-locker in place instead of the grease they used. I can't remove the drive side cap, unsure what tool that is. Did not torque to ~55Nm either, surely that would strip it?
Put spacer on both sides to fit road bike frame, drive side had to machine one.
Fit of chainring was really bad, but its probably fault of chainring, I don't have an "official" sram part to compare to.