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Why do you think there is another block for the blue line? It's just entering by one side of the mast, going up to the block and down to the other side...


The comment about the other end of the red line is still a question. Going back to a Wouter post from 2005 I found this drawing.

[Linked Image]

I'm guessing that this is NOT what is the photo from THIS thread. PTP's comment above says a lot.
"...there is a becket that the other end of the red line is attached to on the block inside the mast to the left."

This latest setup is simpler and 12 to 1 compared to the old photo I've shown here.