Yes I know of Roger and I have been in touch with him. He does not do this type of repair. Roger will not discuss workings of the boiler system, since it's proprietary to Aqua Hot.
He referred me to John Carillo who I have also spoken to. John can do the repair, I have to do the removal since he's in Colorado and I'm in California.
I'm one of those guys who's pretty anal about how I do things. I just don't understand why there are no photos/diagrams of the boiler side of these units. Or, info on how to access them. I understand a Certified Factory Tech not wanting to infringe on Aqua Hots system, but that shouldn't stop the owner from attempting a repair.