There are many projects I can envision completing with either of these machines, but one area I'm really interested in is knife making. An engineer friend of mine doesn't think these guys will handle O1 or A2 tool steel (before hardening). If that's the case, why not? Does it have to do with the spindles, frame, drivers? Are there any upgrades that will allow me to cut harder metals with either the Routy or Ox?