I have had a few done by Fred. Yes, it was worth it for the pure "pleasure" of having it done. It makes for a much smoother, sweeter action. I could not tell you if it made it any more accurate, but that's not necessarily his objective. I suppose it could make a problem action more accurate, but it is primarily intended to make bolt lift easier and sweeter, whatever sweeter means. :)

Once he gets it, it doesn't take but maybe a month or so. The challenge is getting onto his work sheet. If I understand him and Lisa correctly, he does them in batches. You need to ask to be on his list and when he is ready to do some they will contact you. If he is booked or not ready to do any for a while, it can take months to get it done.