Ah, got it. If that's the case, though, I am not sure why you included a "maybe." The conclusion we reach on that thread is more definitive than that. As for email, I am terrible with it. It usually has no chronological correlation with my other activities. Sorry.
I have not mapped the addresses, except to know they are all in the Boston area. As for relationships, King and Newton shared officers, and they were in a trade association with the officers from Service Engineering. I didn't look deeper into family Bios.
EDIT: The one "maybe" I have with BATCO is that uni joint. That is different from the uni joints in the other sets. But we probably shouldn't clutter up this "lost" type thread with discussion, right?