My first thought was the lazy susan also. I have a cheap one that is for my kitchen cabinets and it is small and spins easily. I found it at either walmart or lowes, not sure which. Your idea is exactly what I would do, rkt for the sides, etc.Good luck and don't forget to post pics!
Welcome to your new addiction! I wake up in the morning and check the site, then must check it again before I go to bed at night! You will learn so very much from all of the wonderful people here so find a comfortable spot and have fun!