you're dead on........let me make one suggestion. get a smaller bolt.......I had to put a pretty big hole in the sq. tube because the head didn't offer much clearance once I attached the gauged metal. If I build more, I'd go for something in the #8 or #10 range, maybe even with a standard screw type head, that way the shim plate would have a nice little seat. And don't waist your money on buying gauged metal, if you know anyone or work somewhere with a steel banding machine.......the banding works great! Make sure you have a high speed drill when you drill it.