12V comp will exhaust the capability of your battery and electrical system.
There are no Teslas on the road in the summer daytime heat in Arizona

I am suspicious of the expansion device not opening sufficiently .
Has the system ever had a compressor grenade

Unbeknownst to many, schraders seldom accomplish total sealing. The final seal is actually the plastic cap that goes over the shader. I have worked on cars that had no sealing caps at all…..and they all leaked using a sniffer. I have a kit of assorted caps to correct this problem. For some unknown r...

All that matters to a pressure switch is pressure, whether vapor or liquid

What was the rpm at which you got those readings? Plz provide readings at 1800 rpm.
Why was work done to the system?
225 psi at 75F is a bit high and doesn't leave much leeway when the ambient gets to 95

As you stated usually at the r/d.
It is not clear why you need a second switch.
Any pressure change at one certain point in the system will be felt almost immediately by the entire system. IMO the one sw is sufficient

At what engine rpm did you get your gauge readings? Idle or 1800? S/b at 1800.
John’s questions are very relevant, sounds overcharged from here.
What was the reason for re-charging the system

Allow 1.0 fl oz for the condenser>

Yes, unfortunately. The comp grenaded and took out everything downstream as he described. Please remember that a condenser cannot be flushed

Tim, just to be transparent, due to surgery, I am off this board for a while\
Thanks, Texas Dave