Our ceramic grinding stones are not proprietary, made by Norton Industries, Worcester Ma. (min qty 1,000 pcs I believe). We use their Altos precision mounted point series, fine (600) grit, and an overall excellent stone (as recommended by their engineers for grinding medium hardness ski/board edges) balancing material edge removal (low aggressiveness) with very low heat generation, and a high level of mirror-like polish.
Dremel grinding stones will fit, but they are a much softer Al Ox with a coarser grit that will wear out faster, and they don't leave a decent finish. Of course, there is always a tradeoff of fine grit vs. material removal, and we/Norton have chosen this one stone as an excellent balance.
Sidewalls that protrude beyond the side edge can load up a stone, but the new geometry of EdgeTune Pro II grinds only slightly (2-3 MM) into the sidewall area, so stone loading is minimal, and re-dressing is simple. "Liquid metal" sidewalls are not a problem, although they do load up the stones quickly.
Bevel angles are fixed at 1 degree increments, as very few skiers could not realistically detect a 1/2 degree difference...especially when there are so many other variables involved in edge execution (binding height, location, boot fit, de-tuned tips/tails, etc). We do custom set-ups for high end racing teams w/ 4 degree side bevels, but they are rare.
Reichmann DTS-U is a worthy competitor! Honestly, the speed of this machine is superior, and the amount of edge material removed is also much greater, as they provide full edge clean-up in one pass...popular with shops selling new gear every season, but for racers that sharpen every week, their edges would be all gone in no time. The jury is still out on who creates a sharper, faster edge...stay tuned to this forum!
We do not break up our kit and sell just the pieces to save a buck, because all the content is valuable to the serious skier...a fine 600 DMT stone is always a welcome tool. Safety glasses are a good idea wherever. Priced @ $129 (time of this posting) vs. competition at approx. $800-$3000 seems very fair, and pays for itself within a few shop visits. We offer free shipping to all PSIA, NSP members as well as multiple qty. orders. Please contact us for other discounts.
Hope this helps, and thanks for your interest in EdgeTune. We have evolved over the years and believe we deserve a second look.Stay sharp!
P.S. re; another post, a hollow grind is a radius cut common on chisels and ice skates that makes an acute edge that is incredibly sharp...in fact, too sharp for most skiers on snow surfaces (imagine that...we made an edge that was too good in our last generation tool). Hollow grinds are popular on artificial surfaces that are very tough for the edge to "grab", and they are big in ice kiting (dudes sail across frozen lakes on wide skis!)