2 storey compost bin!

I bought a compost bin but I found it too small for my garden. Also it took quite a long time to break down the material completely. Making it into a 2 stage compost bin with the bottom stage below the top has greatly improved it and greatly improved my compost making too!

Step 1 The problem!

Its too small and the plastic bottom piece (you can just see it in the door of the composter) that would normally be on the ground is easily chewable by rodents creeping up from below.
(The image shows it on top of the concrete base ring I made for it)