Hi. Starfighter here. I have this acft. flying w/3W-75. As Dick Hansen said, this combo WORKS. The plane has more vertical perf. than I can handle(it will climb OOS @1/2 throttle). I did have to add ballast to the nose, approx. 25oz, and the acft. still came in @ approx 25.6lbs. I really like the perf. of the 3W-have no experience w/ZDZ. By the way, check the warranty disclaimer on this acft. I believe it indicates the Warranty is VOID if U install any engine larger than 80cc.