I also have a triple block at the boom end, with a becket that the main sheet terminates on. That triple sends it twice around the lower South Coast fiddle block that is connected(fixed in fact) to a slide car on the track. But instead of terminating there(to a clam cleat or similar), the main sheet goes back up to the triple block at the boom end, turns on the top wheel, and heads back to the mast under the boom.

It turns again at the mast on a block fixed to the bottom of the gooseneck- then turns again at a block at the base of the mast-then heads back along the coach roof-through the wood dodger curb, and onto a 2 speed winch mounted on the cabin top(cleat next to it). I'm certain it's original. The winch-cleat location on top of the cabin isn't ideal sailing alone and people get in the way if you have guests(family just crank it for me).

To really improve it, a better traveler would be needed. But I'm not sure what it would take to terminate at the traveler, and still have the mechanical advantage and fair sheet routing my main requires.