we broke the sheave in our asail halyard block. Anyone know the size (and maybe a part number for it)? We have a Sheldon mast. Also, is it riveted or screwed in? (our mast is currently stepped so it makes the repair a little more difficult 
We plan on sending up a drone this week to check on how its attached.
thanks in advance!
We plan on sending up a drone this week to check on how its attached.thanks in advance!