I still enjoy sailing and testing this model.
I plotted a Polar Diagram, by plotting speed that were developed on various points of sail. I tested points 7-16, against wind Forces 5 and 3. In both diagrams the best speeds were made with the winds at points 8-11. The slowest speed was directly down wind , as it should be. At 6 points and less speed drops off quickly-as it should.
Ship tacking and wearing seemed natural and fluid under different wind speeds and sea conditions. No glaring problems.
Its been my RL experience that no two modern production sloops sail the same. I can only imagine how ships from the 1800s would have differed. The point Im trying to make is don't get lost in the weed with the physics. If the model sails well and hits the key parameters -work with it. Don't worry too much about glitchy physics . Anyway, I have enjoyed playing with it and hope you decide to to do something with your model.
Glenn