This was interesting reading.
Levelling frets under string tension is just over complicating the task and doesn’t really have any benefit.
I like a low action, and I have a fairly light touch. I set my necks pretty much dead flat and I use 9s. I wasn’t able to have the action as low as I wanted on my PRS guitars because their factory setups and tolerances are just too ‘general’, but with work they can be setup to play low. It does take some effort however. I should add that I only really measure action after I’ve got it where I want it, I don’t chase the numbers as each guitar is different.
Having just spent the weekend doing thorough setups of my PRS guitars I observed the following;
1) The (Korean) SE C24 required more fretwork than the American C24, but that still needed fretwork, which was surprising and disappointing in equal measure.
2) With fretwork both guitars are now sitting at 2/64 high E and 3/64 low E. That’s pretty slammed, yet they both sing now. No buzzing, no choking, sustain for days (well, you know...). It was purely coincidence that both guitars ended up having the same action, however based on following the same setup procedure it’s not entirely surprising.
So, if you’re not able to do the fretwork yourself and you’re not 100% about trusting somebody else to do it, it’s probably best just to buy something else, because PRS basically don’t seem to build them to go low. That’s not a criticism, just an observation. My Jackson was able to go that low straight out of the box, because they’re designed to do that and built accordingly.