Robert,
That is so cool.
I am glad that it was needing so little.
I don't remember if you posted this or not, but what is the temp that the tank holds the water at? Looks like with all of that insulation, and the outer cover, it would do a good job of keeping the heat in, and not cycling on all that much.
You will be cleaning your nasty dishes in no time!
Thanks for the pictures.
Brent