I'm the new caretaker of Ariel-109

[Ariel 109]

Paul,

Next time I'm up at City Island I'll measure the winch blocks on Noesis. I'm not sure it will be too helpful because your Commander has it's winches in a different place than my Ariel.

I remember making the tops of the winch blocks a half inch larger in radius than the bases of the winches. And that the tops of the blocks lie a half inch below the tops of the coamings. The winch base tops are perpendicular to the coamings. You might be able to figure the size of the winch base bottoms by looking for old marks on your boat's deck. The blocks taper vertically on their curved side only a few degrees (7° maybe?).

Good luck,

Ben