Well I made a thing today. Started with a fiskars paper corrugator, but it wasn't sturdy enough to corrugate a beer can. Knocked out the axle stubs and replaced them with some 1/4" drill rod and then drilled the end plates and built the frame. Little bit of lapping compound got everything running smoothly. Cleaned that out, greased it up, welded a plate top and bottom and added a 1/4" socket so I can run metal through with a ratchet. Works bretty gud. Top piece is a beer can ran through once. Bottom piece was run through once, then turned a 1/4 turn and run through again just to see what it'd do.