Hello all. I've got a bunch of blades I want to convex, and have no work space for a belt-sander. I found this little contraption that I could potentially take out back & use on my porch.

Has anyone ever used the Work Sharp knife Sharpener? Looks like it might be pretty handy for a lazy guy like me.

http://www.worksharptools.com/index.php?option=com_virtuemart&Itemid=90