Perhaps the woodworking tools I was talking about using, which cost a fewl thousand dollars, are less available without high expense to the average skater than adequate quality 3D printers? Hard core woodworking hobbyists buy such tools, but perhaps few skaters.
I don't know is how accurate the types of 3D printer are that are widely available to the general public in public libraries. The 3D printer I saw used was consistent to a mm or two. But someone said that was poor.
A high end skate blade holder I've seen allowed adjustment of the blade height - which directly affects the centering of the wheel on the hollow - by 1/2000 inch. But I think that is overkill, that the tool need not be shaped that accurately. I doubt woodworking tools could do that well.
I use Pro-Filer by alternating skate or tool orientation every few strokes, to compensate for tool asymmetries and irregularities. And I use enough tape to fit the blade quite snugly, which locks down the geometry, so gravity doesn't matter, and I can hand-hold the tool at any orientation. I think it gives excellent consistent results, by feel, though I don't have the highest accuracy tools to check it.
Using those techniques, would library quality 3D printers do well enough?
Blademaster only offers 2 ROH's, 1/2" and 3/4", and their
website suggests both tools are for hockey blades, which are much thinner.
If Kaitsu makes his specification files available to the public, and creates files for many different ROH's, maybe they could go to a public library and make their own tools in the desired ROH, that are good enough, for people who use those techniques. Or he could sell his tools to the general public?