Dave -
What you did sounds exactly like what I am doing. Only exception is I am NOT using a Magnum Hybrid. I also was going to keep the existing ATS that shore / gen comes into. I was planning on running it to the new Main ( Sub-Panel ). It will have a 30A for main and 20A for AC. The 30A would then run to my inverter which is pass-thru and also has built in ATS. It will then output to the old Main 30A in the Progressive Dynamics. I will also move the old hard wired outlets from the original inverter to the 20A breaker the AC use to use. My email is
wponder11@gmail.com. Would love to see any pics / diags. I can send you mine also.
Warren