The curved track must compensate for the radius at which it turns causing slack in the leech unless it is then again manually sheeted
Actually that's not the case. Because the track is curved at the same radius as the jib travels through the leech tension does NOT change - outside of some very minor tolerance things, it practically sees no change in sail sheeting tension throughout the full travel of the track. We hardly ever adjust the jib traveler position for racing around the cans. When adjusting for downwind, we only ease the sheet slightly to crack off for the spin run. My fingers are going numb.
You're welcome to inspect the geometry on mine this weekend while I hold your beer.
