Looks good! My only advice is to perhaps switch to supporting the tubs from below. It said it was the better method in the tutorial I was using, and I decided to go with the rails instead. Bad idea, tubs can and WILL drop out of the rails, and it makes one helluva mess. Especially if you have a whole bunch of mobile rats in the bin that happens to drop.

I don't bother with the auto-watering system. Each bin of 1.4 has 2x 32oz water bottles. They go through the whole 64oz in about 3-4 days. Not so bad!