Sorry to do this to you. I love composting but Earth Machines are not
rat proof. I had one, a roof rat chewed through the bottom and made a
nice home in there one winter. It did a wonderful job of turning the
compost for me.

You might want to consider watering your compost from time to time,
this seems to annoy the heck out of the rats. Eventually, they left.
Last time I saw one, my husband called me over to see a 'chipmunk' on
the neighbour's picnic table. He'd never seen a rat before.