That's a cool rig. I need to post pics of my construction in process. I ended up with a design very similar to patandchickens. My chicks hatched this weekend. So far 6 total, one still working it's way out (not sure if it will make it or not!) and one egg with no signs of hatching even though it looked great when I candled it. All EE and the mystery brown egg ended up being a barred rock (it was either gonna be barred rock or RIR). Lots of excitement at my house and now the pressure is on for finishing the tractor!