Make sure your sheet is lined up perfectly because the design as posted does not leave a lot of room around the cut pieces. It consumes the entire sheet of ABS. This project is extremely straight forward.
Glue the larger ring to the underside of the rotating platform using some CA glue. The smaller ring is a direct fit inside the larger ring, and should be fixed to the platform with the four connectors using a nut and a bot, M3x16mm or longer.
This step is the easiest and most rewarding of the project. A very straight forward design, slot the lower braces in the both sides and hook the top plate with the hooks into place. Push the four keys in the holes above the lower braces to stiffen the structure, drop the top platform on the box and you are done! An easy to assemble and disassemble RC car stand.