I put the treads on the tank, and I'm calling it done.
Getting the treads on was a little tricky. In spite of following the instructions for how to set them up, they didn't quite line up correctly. So, on one side they overlap a little extra. On the other side, there's a gap near the bottom. I also found that the spray sealer reduced the effect of the metallic powder on the treads, which is too bad. Oh well. Also, even with the sealer, the powder tended to rub off.
Anyway, it's done, and tomorrow I'll move on to other things.