Sorry guys. Busy Easter.
I've mostly reinforced the bottom. I've attached a back though kinda ugly and started building the false bottom. Hubby lost interest :/ so it's been all me. Lol. I'll get some pictures later. It's still pretty early in the morning here.
I've got some exterior paint. I went with white. It's (apparently) safe for areas of rainwater run off used for human consumption. The tanks going to be topless so I didn't want to have evaporation dripping from the paint into the tank poisoning the fish.