I have an odd question which i couldn't find results of in a search. Why is it that you show the blade being sharpened at a 45 degree angle from the stone on your website? I have always used a straight on approach sharpening blades, thus wearing the stone evenly. With the blade at a 45 angle wont you need to constantly flip the stone over? This assumes you don't sharpen left handed blades like on a walker or scag cougar, although we do use walkers, and therefore do sharpen left handed blades. next question is concerning the life of a stone. If I personally use a grinder and noone else in our company, the stone would conceivably last at least 2 months. As it stands, sometimes we are lucky to get a month out of a stone. To be exact, the latest stone lasted for 5 working days $47.00 down the drain. how do your 8x1x 5/8 stones handle, and do you have different types of stone (aluminum oxide, etc.) Currently, we sharpen approximately 150 blades a week sometimes more sometimes less. P.S. We are currently in the market for 2 new blade grinders(currently use an RBG grinder), so any information would be greatly appreciated.