I flew mine last week for the first time. Have a AGM 30cc gas engine with 18 - 8 prop, I used the Hitec mini servos for retract that fit the cutouts and they're pretty useless as they don't have the power to pull them both back in. Flew it gear down and plane was no problem and handled really nice. Weak point is the gear which I'm sure will promptly collapse with anything but a feather lite landing. I have the HK heavier electric retracts which I'm sure will be an improvement but haven't put on as I haven't figured out the struts yet. I thought the plane was a pretty quality ARF otherwise and it looks really good when completed.