So when I bought my SE Custom 24 last year I probably should have done more research about the guitar, was definitely attracted by the looks (IMO PRS has some of the sexiest guitars out there) but really it plays like a gem. I love the feel of it, but one issue that's plagued me for a long time is this pinging sound when I palm mute on the A string, and from what I gathered, notoriously these guitars are known for their tuning instability. My other guitar, a Schecter, doesn't have either of these problems, and is 500$ cheaper. But I don't want to give up on this guitar. I read all about how the nuts are awful on SE's, so I bought a TUSQ nut that I read was a direct replacement for the SE, took it to my only local guitar tech (from a very rural small town) and he claims it didn't fit, so he never put it on. Said he would get some in after Christmas and he'd let me know. It's now late March and he hasn't gotten back to me even after me messaging him asking if he has them. I don't want to give him any more business because he's just been ridiculous about this. So I'm likely left in my own hands. Unfortunately I have no idea how to replace a nut so would my best option be to try and widen the slots in the stock nut? And how would one do this? I absolutely love this guitar and I don't want to give up on it.