Nutball, exactly why I was looking for the best grinder available (without spending $2500 or more). As mentioned, my friend had a cheap one from HF and threw it away. With 5-6 employees and no one really sharpens in the field, he needs a way to keep up and stop spending such a massive amount of money on new chains. They don't even touch up new chains, they all think 'new' is 'sharp' so they have no real experience running sharp saws. Unfortunately this is more common than not with small treecos around here.