I'm thinking of buying the G2790 Universal Knife Grinder from Grizzly, anyone have one and can tell me if it works and what grit wheel is best. I'm wanting it for my 20" planer blades and 8" jointer blades. At $60.00 a pop to sharpen my planer blades it would not take long to be money ahead...if it works correctly.

http://www.grizzly.com/products/G2790

Thanks,
Rick