All I can tell you is that there have been a few DUC props replaced by the Eprop here and everyone of the guys says the eprop is much better..quieter, more performance, super smooth also the engine starts and stops easier because the prop is so light. I have not had one person return a prop. Eprop give a 6 month return on the prop..If you use it and you dont find its a improvement and a better prop than what you like they will give you your money back....someone who stands behind their product
https://aircraft.e-props.fr/satisfied.php
Just some small feedback...977 of them
https://aircraft.e-props.fr/feedback.php