Drawing is a chore.

I'm still turning the sketches into 1:12 drawings I can have printed.
I'm also starting to work on details like battery placement and
conduits for the wiring harness.

I had another idea that I want to bounce off the engineers.

I expect it's going to be difficult to keep the batteries charged
and if the onboard system can't keep up with the consumption on
any given day, adding more batteries really isn't going to help.
I'm thinking maybe if I were to add more batteries for ballast,
it might be helpful if I could reconfigure them.
When battery power got low, rather then run the risk of cooking off
a motor running it on voltage that's too low, I could switch from
(for instance) 6 pairs of 2 batteries to 3 pairs of 3.

The setup I had in mind is pretty simple. Picture an old fashioned
telephone switchboard from a 3 stooges flick.
I get a bunch of high amp connectors of the type they use on welding
cables, I run the leads to the ESC/motors down either side of the
battery bay with a series of female connectors in the lines.
Each battery terminal will have both a female connector and a pigtail
with a male connector that can be plugged either into the feeder
cables to the ESC/motor or into the battery next to it.