I am going to lap my new Glac and I want to make sure I do it right. I have only had to lap one hsf before, and Orb (I know) and I just used sandpaper on a flat surface until it was flat and uniform. I figure that I will start on the Glac with say 300 and then go over it with 600 until flat and uniform. I have read how you don't want a mirror finish just flat. Is this the right way and if not what is? Thanks for your help