I bought that chicago for the buffing attachment. We all know we need to buff on an Ebay razor every once in a while, but its nice to have the belt sander aslo. I have had to grind on a couple blades and it really comes in handy. If you plan on making a hollow grind. Really look at a couple of set ups. You can view a few on youtube and google. A hollow grind tends to be tricky as seen in most of the videos on the web. I have seen a couple of machines that have two wheel setups moving in the same direction. This makes it a uniform grind. We were posting on this about 6or7 months ago, but I cannot find the link. Most of the machines I have seen the people made their own wheels out of wood. I do not have the time to do this, but am so very interested to see what you come up with.