I have been interested in trying a top hatch, but a structures guy familiar with this airplane advised me against it. I'm looking forward to seeing how yours works.
It's good that you have cooling air going to the stuff that needs cooling. Mine didn't, so I had to make silly internal ducts.
We have found (PW has found, and eventually convinced me) that the battery CG for these airplanes should be approximately at the wing centerline. Looks like yours is closer than where mine started.
Pretty airplane. I think the aft section color is particularly tasteful.