I am located in northeastern PA. I wanted to know who would be the best to do stone grinds on snowboards? I have had a local shop do some in the past, one board came out well, the other did not. Also, will edges damage the grinder? If so, can they tell me what I would need to do to the base edges before they could perform the stone grind? I would appreciate any recommendations anyone can give about where to go. even if I have to go somewhere a little further and wait while they do it, I am only looking for grinds for structure, not looking for my edges to be sharpened or base waxed. Thanks for any responses in advance.