Michael,
Thanks for the info. The system was completely empty when I started working on it this weekend. I know the system holds 1.1 Kg of freon (38 oz) but am not too sure how much I added (have old tank of freon but no scale). So that was another question as to any way, beside having a scale or small cans of freon, to determine if have sufficient freon in system. I had heard in the past that you could look to the sight glass to see when bubbles were removed and I was trying to target that. The dye in the evaporator condensate is a good idea. I will have to look at the puddle.
Thanks,
Lee