No report of problems on other size than 430.
But South of France is a Highwind aera and a lot of Pryde addicts sold theyre Evo II 5.5/5.1, after only 2/3 use...
6.2 with the good mast, or cam triming goes higher than the 5.5...
Bad Sails or mast problem ???
The bottom of the bases have the same size, the "Q" one reduce as a Drop Shape.