Howdy, I've been looking for a blade grinder and would like some input on which on would be the best buy. The Mag is a little out of price range. Have been looking at the RBG and 1 from Foley Bellshaw. I want to be able to do Mulching blades also. Found one from Oregon but it looks a little flimsy. Thanks for any info.. Oh BTW, What are they talking about with Left handed blades??