My Flat bed was bought again, from a local seller. It was $50. I intend to put some flashing lights on the front to give it a professional look. The rear end of the trailer lifts up and down by a 10k pot. It uses 1 arduino nano, 1 10k pot and 1 lipo battery. Since these photos I have added a 555 Timer into the frame work near the middle wheel axle. I then rewired all the electronics and replaced the servo. The old servo had a gear grinding problem where the driving gear on the inside of the servo would rub on a gear it wasn't suppose to rub on. I made and 3D printed a case on Tinkercad using a rectangle. It was printed at 20% infill in Jaycar Electronics PLA Blue.