Very nice!
Where did you get the knurling wheels? Did you possibly do a build thread on this? It certainly would be worthy of that, great design done on the cheap, I like that.
if you want i can make a picture of the various profile and dimensions wheels I conserved in a small collection
...I make a lot of knurling and sometimes constructing specific tools fot the Tripan system as on this page : http://www.lecollectionneur.ch/po-tripan/
That's awesome