i have about 4 flights on mine. And in the wind it just hangs like a kite at idle. i am using an OS 91 4 cycle. So far I have a problem with the fuel tank mounted too high. It floods the engine with a full tank of fuel all the time. i then have dead sticked it 3 times. The engine just quits when I idle it down in the air, but runs fine on the ground. It lands good but does nose over a few times after landing to a dead stop.
I did add about 4 oz at the firewall, but removed the 2 oz brass nut on the prop and it flies much more docile and doesn,t nose over a lot on the ground when taxxing.
So, I will now try to lower the tank somehow. If anyone has any ideas let me know how to do this!! i mounted it where it says in the booklet, at the hole in the firewall. It is tooo high , almost a quarter of an inch above the needle valve. Fuel just drains down into the carb with plane just sitting on the ground.