Is it unrealistic to shoot for 5K rpm? The 3505 5" Bison chuck I've got is rated to 5500 rpm, and the bearings will be way above that. A 1.35:1 for a 3700rpm 3hp motor will still be 2.2 ponies. I'll have a couple pulleys 1:3 for lower speed applications in Titaniums or Inconel. Any thoughts? Thanks