Has anyone tried using the Smith Diamond Sharpening system? I noticed they had one at Lowes that when I looked at the back said it was equivalent to 750 grit. It looks similar to the DMT.. here is a link to one that is on ebay at the moment

SMITH'S #DBSF DIAMOND SHARPENING STONE-FINE 750 GRIT - eBay (item 300368973726 end time Jun-17-10 11:47:39 PDT)