Have used the MM 9000 on about 8-10 sets of blades now. Seems to be a well built machine and I like having the stand with the balancer on it also. So far, I have found that I prefer to use my side grinder on my used blades first to take off the major part of the blade and then use the MM to put the final touches on the blades and balance it. Most of my blades had 100+ hours on them and needed touch up work that was just faster with a 10,000 rpm side grinder. Will keep some updates as I put more time on it if it doesn't sell soon.