Call Graham if you get stuck, I have a 1.5 that has been upgraded to a 2.2. The instructions aren't too clear, did you get a copy of them? You won't hurt the cartridge by using the wrong amount as long as you have the minimum in the arm. I would never go near a place that charges that much, the local very experienced tech charges $100; I use to do it free when my eyes were better; if I see my instructions I will post, but there are others who know more about the arm than I. Possibly some of them will post.
