Originally Posted by MacBruver
First problem is that there's no direct way to drive the rollers. You'd have to rig up some sort of friction drive, or mill the end off one of em to be able to get a gear on there.
Too soon to say. We need to see one of these disassembled completely before coming up with practical mods. I want to see someone build a mill with one roller fixed in place and the other roller mounted in milled slots on the frame. A yoke could be made with an adjusting screw that would move both ends of the rollers together and ideally, on the fly while the mill is running. We don't know what kind of a shafts the rollers have, but it shouldn't be too hard to modify them even if they have to be drilled out. The machining tolerances need to be fairly tight, so this is above my home shop DIY level.
I already have a mill that works just fine for me, but I can't resist taking a look at this kind of stuff.