I use rc56 canopy glue as thread locker. I have done this for 20+ years on servo arms, nuts, wheel collar set screws, etc. Never had anything come loose. The best part abt it is, it does not dry hard, so taking it back apart is not to bad at all.

For muffler bolts I use high-temp silicone as a thread locker.

Good luck and CONGRATS on your first nitro plane.

pcm.