[Dafni]

Thanks again, boys.

Yes, sylvester, Serum is right. The rear center driveshaft occupies the room under the motor.
I could fit a 99 amp ESC there, but for the 120 amp Micro, it just wouldn't fit. I tested this. This was actually my initial design, but I wanted to keep the motor as low as possible. (now the spur is flush with the bottom of the chassis plate, btw) Plus, the ESC on one side gives a nice balance to the servo.