Retrofit Notes in video; note that I was initially backwards in the direction of closing/opening the blue(low) and red(high) side service adapters on the service ports...consult your service guage set for your proper operations. A few comparisons and contrasts to the 'older' R-12 service operations, and what I saw as 'different' and worth mentioning to any of you who are looking to do the same. Be safe in your work, always! -r.