This may help---------In the top sketch we see a side profile of a QS--the LE and TE are all but planar to the stabilizer except for theta- the stabilizer angle of incidence.
In sketch 2 a Fledge leading edge and rear spar are attached to the center tube---but note that the trailing edge of the airfoil drops below the center tube---a line from the LE to trailing edge, the 0 degree angle of attack puts the stabilizer boom way too high and the stabilizer angle of incidence too high (way too high).
In sketch 3 (drawn to scale) my solution solves this and the sail fits on a conventional QS frame. Note the TE detail.
One should also note that the king post, which needs to be paced as near the center of pressure as one can-- is not in a good place in #2. Because the wing is unswept there is too little triangulation from the KP to TE. The wire to the LE triangulates, and pulls the wing rearward. But the KP to TE wire has too little triangulation to effectively pull the wing forward--these two forces are needed, and must be in balance.
The main thing to note-that the sail I propose will fit to a QS frame- Strip the old sail ----- install the new sail and ribs NOTHING MORE-NOTHING!
I hope this help exsplanes (sic) my idea-there may be more than one way to skin a cat----my idea, the only frame changes are -are---are--well nothing! Beat that!