.. and realign and repack with the goal of 'perfect' alignment and uniform 'side loads' on the shafting from the packing, etc.
Rich that's an interesting point about the 'side loads' from the packing. I know that you also own a Tayana 37 and just the other day I repacked the stuffing box. The shaft on the boat is 1 1/4 inch dia and the stuffing box should take a 1/4 inch packing, but I'ld used 3/16 previously and continue to use the 3/16 since it's not possible to fit the 1/4 inch into the box. Over on the TOG site I asked what others were using with the 1 1/4 inch shaft and Harvey said he also used the 3/16 inch since the box was not perfectly concentric around the shaft which then begs the question of unequal side loading. Have you noticed that the shaft is non concentrice with the stuffing box?