So my local shop (Pierce Skate and Ski in Minnesota), uses a Montana HTT 3-d radial base edging machine as part of their tuning process. Basically (if I understand it correctly) it puts about 0.5 deg of base bevel underfoot, but as the ski widens towards the tip and tail the bevel gets a little bigger (lets say 0.75 deg or so, perhaps more on wider skis). Anyway, I'm wondering if any of you have experience maintaining such a tune? SIde edge will be maintained normally, I suppose most would say leave the base edge alone. Which is fine except perhaps for when some damage occurs (rock hit, etc)? Without any other input, I would plan on throwing a diamond stone in a 0.5deg guide and fairly lightly go over just the damaged spot. Any suggestions on maintenance?