Sloop.....
the adjusters are put together to make an "over-center" lever and extension for tightening down the fore-stay/furler and for extending it higher off the deck to be able to see under the Genoa when unrolled.
The tang or chainplate up front has two holes... the adjuster assembly sticking out in front is a lever which is pivoted on the tang's rear hole, the furler drum shackle is attached to the top of the adjuster assembly part sticking up and back, (easy to do.... no struggling) and then the lever is pushed down to tighten the furler stay to a predetermined correct tightness, by pinning the lever down at the tang's front hole (there is a BIG headed pin visible there)
At the pivot hole, the rear one on the tang, there is a large pin which also carries a shackle for... well that is another mod... never mind.
Anyway this rig has worked great for almost two years. It is plenty strong, and acutally used two fastening points to the tang, if one pin should ever come out, the other one will hold the mast from coming down. It's all made out of MacParts, but some hole fileing is needed to make the holes line up (in the lever) with the tang holes.
