I like to hear from anyone who has been using the Magna Matic 9000 to sharpen the curved style mulching blades. The thing cost some bucks but it may be worth it. I currently use a heavy duty 7" hand held grinder with Saitech grinding wheels. I get the Saitech mail order for about nine bucks but it still ads up. I know large bench mounted type grinding wheels usually last forever. It would likely pay for it's self in less than two years.