It might not be how an engineer would build it, but keep going and learn from your mistakes! You could use bicycle brake cables for the throttle cable. Frame in the underside of the plywood with 2x4 lumber to give it a frame and to give yourselves someplace to put the axles.
![CAMPปลิ้น | EP.83[1/2] เปิดแคมป์หลอนต้อนรับ 2 ตัวพ่อแห่งวงการผี!](http://i.ytimg.com/vi/2uPuHYHgwiI/mqdefault.jpg)
It might not be how an engineer would build it, but keep going and learn from your mistakes! You could use bicycle brake cables for the throttle cable. Frame in the underside of the plywood with 2x4 lumber to give it a frame and to give yourselves someplace to put the axles.