gerd writing you to tell you that this 9000 blade grinder WILL do a blade in 60 seconds or less! very pleased with this unit, and i strongly encourage anyone in the market for one to please consider this one for medium to high lift mower blades. as for the 1000 GS balancer which i purchased 4 years ago is the best there is for the balancing. i took your advice on balancing before and after sharpening with the 9000 and found your advice correct being the slightest movement down to 6 o'clock more of that heavy side has to be removed. once i saw how this works now i am able to get the blades within reason every time! thank you for the informative phone conversation talk on this. happy customer, mike.