Now I'm starting to clean up the pieces and parts and continue to test everything out. Today I worked on the noise that was coming from the water heater when I had the circulating pumps on. The solar pumps do not make any real noise but there was a buzzing sound from the water heater. After some false fixes, I found that the check valve on the cold water inlet was making the noise. I removed it (ordered new one) and that took care of the noise.
Now the system is very very quiet - just the slight sounds of the computer fans that blow thru the heat exchangers.
Really waiting for some real cold weather to do some more testing.
So far, it has turned out great. Once I get it all set, I'll post some pictures and document some of the items that I added - just in case someone is researching this in the future. All the original equipment for our 06VH is still in place and working, we just have another option.
Hopefully I'll run the Espar all night Thursday (28 degrees) to see if my changes fixed the water temps slowly getting colder thru the night.