Just an FYI, at both VIR and Summit Point last year both Michelin and Dunlop tire sales were using the Nomar tire machine and balancer. Both manual types. Powered spin balancers are complete overkill for even racing bikes according to them.
I like either Marc Parnes or Beamer Balancer for tire balancing. I still don't think, for true accuracy, just using the axle and wheel bearings are sufficient.