Isnt Coop's mod 2 the ramp/channel milling as well?X-2... Sledder had been tuning CVT's long before ATV's were created.
Many believe coop is the "inventor". The CVT clutch moding has been around since it was invent around 1880 for a sawmill. As the guy that invented later started adapting it to cars he had to "mod" the CVT to get the results he was looking for or needed.
Andrew Deal is not doing anything "New". He is combining modern technics as Coop (face milling) uses and ramp/channel milling as Hunterworks uses. Just Because I Said is, besides being a Donkey does channel milling.
There are a few other sheave miller out there. Hell, I did my own on my drill press.
As far as I know Hunterworks is the only CNC miller. He normally has many available to ship out. Unlike all the others he is also the only one that has a dyno to prove his work.