Hi:
I started the constrution of my sail boat. the mast and boons are finished, also the sails, just need to put the eyelets in them.
i am about to start the foam carving for the hull mold and started to think about radio and rigging settings.

i am about to use a 10 cms. long servo arm ( made by myself in aluminum 2,5mm thick). As the servo travels 120 degrees from fully closed to fully opened position it gives me 17.5 cms. in staright line travel.
It means that if I want to get 90 degrees movement in main and jib booms i need to place catch them at 13,5 cms. from their pivot ponit ¿ where joins the mast, for the main boom, and from it is catched to the deck in the jib boom?

the question is: for rigging to the servo, what is more usefull???.....use a direct sheet line from boom to servo or place in between a pulley or ring as described in the drawing.
please any recomendation will be appreciated.

Tato Lazo