It has an applied composites mast (which I'm guessing is now FibreFoam) and the diamond wires go through the bottom mast plate to individual nuts on the underside...it's a real PIA to adjust tension.
I had a similar Applied Comp mast on a Boyer 4. I had the diamonds cut short and fitted with a toggle/swage turnbuckle at the bottom. With the toggle removed, the "T" that formerly held the toggle slides through the hole in the mast base. It's not adjustable from the wire, but is easier to adjust than the stock system, quick to implement, and cheap.
