Ok everyone....bear with me. I am going to try and explain this as best as I can. My personal fav bass is the 78 Fender P I started on years ago. It's a fat/thick P neck but over years and years of playing the ends...or edges (top and bottom of each fret) have become more rounded and it actually feels somewhere between a P and a J neck. (Have I lost everyone??) Problem is...every P neck I have aside from this one the edge of the fingerboard (top and bottom side of each fret) feels sharp and sometimes painful when I bite down. I feel like it's because I got used to the 78's weathered/rounded edges. My question is: Would I have to defret the board to sand the top and bottom edges flat or just use some kind of sanding tool to do this and then slowly use a fret file to file down the fret ends as I round off the wood at the edges? I appologize for really making this difficult to understand. I'm just kinda at a loss as to what to do. I had originally thought a radius block would do it but those are used for frets and such and not the corners.