Thanks pez and Navy Dan!

Navy Dan, I'm hull 410, so we're sister ships. Also the Schaefer track at riggging and hardware isn't an exact match to our Merriman T-Track, which only matters because I'm going to butt the new track up against the existing track to that the spinnaker car can slide from one track to the next.

Does anyone know if the wall thickness at the most forward part of the mast is thicker than the .13" that Rig Rite has documented?