As a side thought, you could flip the tranny around so that the motor facers the rear, that way you wont have to run the wires over the mount & spur gear ( I see its padded eith foam, but you'd be suprised how hungry those things get...
**nom nom nom, silicon and copper, my favourite!**
Unless it affects weight balance too much, but it shouldnt do. That will also allow you to shorten to the motor wires quite alot for less resistance and a cleaner look. Though muddy is also a good look