recharge

When we bought Ms. Scarlet in 2017 the Clardy air installed in 1983 was dead. Replaced the compressor with a York and replaced the dryer. Everything else was good to go. Spent the extra money to stay with R12 for better cooling on the advise of the mechanic. Everything has been good until this...

I am looking at recharging the AC on my LX470 on my own with a canister of R-132A. I have read both ways that you do and don't have to vacuum down the old refrigerant in the system. Who has experience with re-changing you AC system on your own? And did you vacuum down the old refrigerant...