Vert Stack 450RPM Drivetrain

I designed this VEX V5 drivetrain in CAD as a four wheel base built on aluminum C channels. The drivetrain is 27 holes long, and I would make it longer to accommodate funnels. The power comes from four black V5 smart motors mounted in the center, and each motor drives a train of red gears that carry torque out to the wheels. The motors are stacked vertically so everything packages into a compact footprint, and the setup is geared for 450 RPM. It sits on 4 wheels because that is a good way to remove the 5th and 6th wheel on both sides.