[magman]

Well...will the motor spin up to 60K and survive for long...probably not. Many here feel that anything under 35K is using the motor at its peak efficiency. I personally try to keep it under 30K when ever possible depending on set up. Put it this way...with my set up, the motor is only spinning 26K. Top speed is 40 or so which is fine as I am not looking for speed runs.