My thoughts exactly and as such I looked at how my design can be made to accept a windsurfer rig. Personally I have about 4 windsurfer rigs in my shed, so this effort is not completely without benefits to myself !

Turns out that fitting a plain windsurfer rig to what I had already designed was pretty easy. It will perform less then the real F12 rig, as the surfer sails are probably a little to flat, but then again most are not concerned with that.

Actually a standard F12 can be made to accept the windsurfer rig without large modifications. Pretty much adding a fitting to the mainbeam to take the foot that is on the windsurfer mast itself and fixing a ring to the boom that goes over the mast support. If push comes to shoove then even two lashings can take care of this.

The mainsheet will remain as it is but won't be run through the first block near the mast (= downhaul on the standard rig)

Wouter