With vibration in shaft still quite present I decided not to risk making my own trip to the yard and took advantage of the BoatUS membership to get towed. Timed it to high tide and got lucky with perfectly calm weather. Tied up at Spaulding Marine Center for a quick haul out for cutlass bearing replacement.
This is the last piece of the puzzle – it may take care of the 100% of the vibration problem or most of it. I’ll likely still need to play with shaft alignment. We’ll see.
