My memory may not be 100% clear on this, but I feel like I picked up the beeswax trick from Bill/drbassman. At a minimum, I'm sure it came from the Reranch forum, which is what led me here.
That said...more details...I feel like I have been saying details a lot recently. It's starting to sound weird. Details...hmmm.
So, I use these inserts with red paint on them over and over as drill guides to allow the neck mounting machine screws to sink deeper into the neck. Once set, I drip thin CA around the perimeter to lock them in. Then I chase the threads and tap the maple using...beeswax. By the way, these EZ Lok inserts are designed for metal, so I clean the pink goop (thread locker) before I use them in wood.