More likely I’m very bad at gauging how much the cans weigh full vs empty, or that something was leaking. I certainly vented some refrigerant when disconnecting my side can tap, but my understanding is that that is normal. No cans have exploded on me, so that’s good.
Also, both of my hoses are the same diameter, so I don't have a good way to tell by sight. I finally just traced the hoses from the compressor, given that the driver's side one goes to the condenser and would be the low pressure side. The way the hoses cross each other at the compressor threw me for a bit, and it's easy to miss that in the parts manual diagram as well.
I’m at the car now with the engine running and have 40 PSI on the low side and 350 PSI on the high side (it’s 78 degrees ambient). The compressor has been running the entire time, and the vents are still blowing hot air. It was still going up when I turned the car, so now I’m guessing that I’ve overfilled it? Still Dortmund explain the hot air, though...
Thanks!
— Joe