I know how to sharpen lawn mower blades, but I don't have the tools to do it! My question is what type of air compressor do I need to buy - as in HP, PSI and gallon size. I also need to know what type of air drill to buy as well. Any ideas on a good hand grinder would be appreciated as well. I've been using my father-in-laws stuff to do it but it is a hassell, I want to be able to start everyday with a set of sharpened blades, not just once a week. Thanks!