Hi Shannan

My P19MX is in the backyard ... mast down ... but if my memory serves me, my mast (when set up) is approimently 12" BEHIND the transom as measured using the trap wire or halyard. you'll need to hold a straight edge along the shear line (upper edge of deck/hull) of the hull. Somewhere around here I have a Randy Smythe Tuning Guide, don't know where though. Basically Randy raked the mast until it would just miss hitting the mast base on the crossbar when the mast rotated. Note you will nead to really loosen the rig to get the step pin in and raise the mast.

My D-Wire Tension is in the same range ... Randy spec'd 2" of mast pre-bend. I replaced my stock D-Wires w/ DieForm wire to help w/ the increased loading

Hope this helps

HarryMurphey
TheMightyHobie18(Mag), P19(MX)