> I just got my MT prop back from the grease-seal modification. I had a
> full rebuild done at the same time. Unfortunately, there is more
> vibration than before the rebuild, so I guess it's time to have it
> dynamically balanced.


Give the prop at least 5 hours of use before dynamic balancing.  MT
recommends this because the grease takes a while to distribute itself
evenly, and you may see some or all of that vibration go away.  

Regards,
DJ Molny
Extra 300/L (with MTV-14 prop)