I did a pretty big AC service last summer, thanks flintknapper.
New compressor, condenser, expansion valve, drier, schrader valves and all new gaskets. I flushed the system completely, cleaned the evaporator and blower. They were a mess. I drained the oil out of the new compressor to confirm how much. I didn't quite get 8 oz out, but I didn't expect to. I put most back into the compressor, added a little to the condenser and evaporator. I added just a tiny bit of extra oil, I can't recall how much but just enough to almost get it to the full 8 oz. My reasoning was that it would be impossible to completely drain the compressor of oil. Then with some real time questions answered, I got the AC blowing mid 50's while 107˚ outside at idle.
^^^^^ You did it 'right'. A/C work is too involved not to. So easy to lose all your hard work to one misstep or shortcut. You were very patient. Meticulous in your work and got a good outcome as the result of it.
Good Job!