Hi Peter, I have tried a set of Falcon propellers and am pleased with the performance. I flew the P schedule on a calm day with original Brenner props and then with the Falcons. The numbers from my Mezon were almost identical. 74A , 3450 mA draw and revs slightly higher with the falcon. The sound was a little different ( small bit of syncopation) as falcons are the same length but it was so small not to be unpleasant. A good alternative and cheaper due to less shipping costs and no duty to be paid. Difference approx €75.