*****EDIT October 2016****
It's been about 3 years, and this system has not lost the charge, and still cools perfect.
****EDIT January 2016*****
For some reason, air conditioning videos bring idiots out of the woodwork. For that reason, all of my household, and automotive A/C videos now require my approval before any comments will be displayed. I am sorry for this, and I know it slows down the discussion. It has become necessary to keep the troll attacks to a minimum. I hope you understand.
*****End Edit*****
My second "duster spray" refrigerant expiriment. This one is on a 1986 Buick Century with a V5 compressor. The old dryer dismantled and explained.