Now you can glue the can halves to the top and base CDs. Make sure each half stays vertical--use a square if you need to. You want the turbine to be as upright as possible. It's not hard to do, but it takes a little patience and a fair amount of hot glue.
Also, try to follow those templates. The Savonius turbine requires that the two halves sort of over lap. This lets the air push on both "buckets" at once. Clever, huh?