After all those updates and drama, I swapped the new derailleurs and connected to E-tube and they were already recognized and worked as if the only thing needed was to update the firmware on everything before starting. I even got a "Relax" notification on my Garmin watch, but in the end, nothing went wrong (except I can't get on of those wire grommets back into the hole in the frame). The 10 year old battery doesn't enable any features, but now I have to decide whether to replace it, or steel my wife's battery while she is out of the country (she refuses to use any of the additional features, and the 10 year old battery holds a charge for 4 to 6 months still.
Thanks again to everyone who helped/advised.
