1. Close blinds completely, pull on chain. If it aligns, ok. If not, close them the other way, pull again. If no success, go to 2
2. Remove slat, push up on plastic holder with pliers, etc. If it lifts, try to twist-CAREFULLY- to align.
3. If that does not work, inspect where plastic holder enters top. It there is a rectangular slot just big enough for the holder, you have to push the holder up about 3/8 inches. Then, pull chain to align all the veins with the rectangle on the one you are fixing. Then, pull down on the holder. It now aligns with all the others. Attach your vane, and recheck alignment.
Aldon Pierce, October 2010