Phefo's star board fock mast foundation

Phefo features 4 masts @ 1 sail of 15 m2 each. Central sail control point on bridge deck. While mast rake is normally aft, Phefo's masts rake forward and outward, especially the fock masts, as well as the main masts to a lesser degree. All 4 sails have exactly the same size. Easy to replace. The mast slides into the mast foundation and can not rotate. Oh yes, 4 sheets per sail control from bottom to top. Weight of sail including battens ca. 4 kg. I never broke a sail, only masts.