I think I'm picking up mine in 2 weeks. I had a 29MV selected for tomorrow, but there was a drive shaft vibration. Ford had to pull the whole thing off and send it out for work. As luck would have it, another 29MV rolled into the dealership yesterday. So we're going with that one.
They tell me its most likely a balance issue, but I'm not taking any chances. Not with something like that. A A/C unit maybe, but nothing drivetrain related.