right, right, thanks Duane. The chamfer tool they advertise to use would be correct for the headstock. Totally different angle on the barrel, but the main improvement is that the barrel doesn't turn. Which is why when we were full time repair I saw so many eat into the back of the headstock after many years. They're cool, I shouldn't bad mouth. Just need to be installed correctly like you say. Just the way StewMac loves to monopolize and over price....ahh I still buy their stuff. I can get UPT's for $10 less a set and there is a lot more goin' on there, but totally different I suppose. After looking over these Waverly's better I would possibly use them in the future. Or not be opposed to it if a customer wanted them.