Kent, I have been following your saga and am wishing you the best. Thank you for keeping us all in the loop.
Others be advised: When I had the generator on SM384 serviced at Amel Caraibes/Martinique in 2011 the first thing Amel's sub-contracted technician did was ask me if I wanted him to remove the Onan ground isolation relay. I had no idea what it was or why it was there at the time and it was not causing a problem. The technician told me it was "not a necessary part" and sometimes caused problems and recommended I have him remove it. Not knowing any better (from you experience and postings), and since he was an agent of Amel, I agreed and let him take it out. Priority#1 when next aboard will be to find it and have it re-installed. Hopefully I will have a prop shaft and C-Drive remaining on my next haul-out. One more lesson for me in never un-Amel-ing anything and trusting that everything is there for a reason.   - Jim  SM384 Sirena Azul, Seattle