If I were to set up a Classic Palm Graver to my workshop air compressor would I need to have some kind of oil filter or is that necessary. The regulator does not handle that as well as the regulation does it? My compressor it a little loud, how often might it be coming on? It's obvious I am a newbee, I have never engraved the first line yet. If I have not had any class or schooling would it be of any value to get a Palm graver and start fooling around on my own, or is that somethiong that will hurt me more later on when I get into the class?