So far so good but I think I might need a motor…. using a piece of string to spin it up should get you to 2000rpm apparently but its at 10,000+ that you start to feel it, and getting it up to those speeds when it’s not really a powerball might be an issue :p I only need those speed for short time but still….

I put it together with out the plastic washers so it’s got a little too much friction right now, but it certainly fits together ok.