I bought the 9000 combo! At first the price seemed a little pricey but after alot of research I decided to give it a try! A week prior I ran over a rope and thought my blades were bent so I through them away,when my grinder showed up I dug them out of the trash to use them to practice on and to my amazement they were strait as could be. So right off the bat the balancer saved me 60.00. It's been a few weeks now and have sharpened several blades and can't imagine a better sharpener. Thanks for a great product!