I ordered a set last week by phone. Had them in stock. There are two nuts on the center shaft. The top one sets the tension the one underneath not supposed to touch. Holds some seal. ask me how I know that. Dave
Patience is your best virtue... You'll be glad to get them when they are in your hands. And look at the bright side, you don't have to wait 10 weeks in the case of some other drivetrain item.