Finished my D2 install today- man that was a lot of work! Could probably do another one in 1/3 the time now that I've done one.
Pretty sweet- not too loud as I had feared, comparable to a regular LP RV furnace or water heater. I did use the Espar exhaust silencer- I think I may make something to quiet the intake sound a little- that is easier since that side doesn't get hot- could be made out of PVC pipe.
I also determined the Transit tank when 1/4 full and with the front on 8-10" ramps- the aux fuel straw is apparently above the fuel.
Even when I added fuel, the initial prime of the fuel line is tedious- the pump is very small volume. I used 5/16" fuel line from the tank fitting to the pump- takes a long time to fill that big of a line. There is a reason the factory Espar lines are very small! 1.5mm on output side, 2.0mm on input side if you use the supplied line.