OK. . .I should have checked that thread first, that was not the grain mill thread, that was an actual CNC mill. . .
. . .but I think I found it this time; I'm starting it now. . .
The roller diameter issue makes sense to me; I will have to modify my CTC mounting distance and size of gears, but that's no big deal since I haven't actually started making any parts yet (guess it's a good thing I was busy today because I intended to start making parts if I had time).