Over a month ago now, with a little trepidation, I left my 74 Jazz with Jon Shuker for a refret and new nut. Also had a little of the slickness taken off the back of the neck.
Had it back a couple of weeks and could not be happier. Plays like a dream.
If you’re considering doing this I’d say get it done, you’ll wish, just like I have, that you’d have done it sooner.