The sheets go forward to a block on a bridle for the main sheet. The jib sheet and elastic go through a double block attached to the chain plate to keep things from rubbing on the mast, then through an adjustable double block forward. The jib sheet then goes back to a deck mounted block. The elastic is then hooked to a loop on deck. John put a hook in the elastic so he can release tension when in storage.
Chain plates and mast step are laid out per Scott Rowlands tuning guide.
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In tweaker photo bellow you can see the tweaker servo and winch mount.
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