Aero engineer’s reply:
We intentionally placed the idler on the “wrong” side. It’s more of a preferred side to be fair, and we had good reasons. First, the Aero Pro is a street board using street wheels, placing the idler on the driving side will make it easier for clearing the debris. Second, the Aero Pro isn’t 200A/side, we have only 20/25Amps running per motor and it’s not a lot of load. And lastly, the drivetrain on the Aero Pro was designed to decouple the motor and the wheel, in order to improve coasting. That means the belt, as shown in the videos, is run loose. With the idler on the top-side, the loose belt is more likely to be damaged by the road and might even cause a safety risk when it gets caught on something. It can be flipped, but you lose the bash-guard mounting points and might damage the motors when you use the Picktail.
—Russell