Actually the spreader rake measurement won't change as diamond wire tension increases; the spreaders are fixed in their relationship to that section of mast. The top and bottom of the mast bend, and the angle of the wire around the spreader changes, but the spreaders stay fixed the same distance away. MIGHT get some minor deflection of the spreaders themselves. Minor point, but it does make it easier to measure. Still need to drop tension to change spreader rake, though.

My question is can you point with the mast raked back past the sterns in light air, even with the new sails?