I fitt ZU-JWN with a Hoffmann featherable prop and was pleasantly surprise with the difference in performance.
My max speed goes up from 160 kph to 210 kph = 50 kph
Cruise 190kph at 2800 rpm.
My climb rate at 2700ft goes up from 350 ft /min to 550 ft /min = 3250rpm
Russell, cableman made me a new state of the art cable and I can now change pitch for cruise at 2200 rpm inflight airspeed , 120 kph no need to stall the aircraft. To change to fully fine again I reduse rpm to 1000 pull the cable and pitch is set. Works 100%
Nothing wrong with aerovee. I am 100% satisfied.
Seems to me I must sell the Express and not the glider.