Chickadilly Circus - The crate coop/tractor

Nice coop! The re-use of the crate was clever and a good way to save some money on the build.

Nice coop. What is the white tray in the bottom under/behind the ramp? How many chickens are you going to house there? Good idea with hanging the bells on the chicken wire, however, I still think it would be 100 x's more secure if you had used hardware cloth everywhere you used chicken wire.
How easy is it to move?
Now that you have been using it, is there anything you would do differently if you were to build it again?

Great coop and kudos on re-using stuff. Easy to understand the building process and plenty of pics.