Hello Decathlon flyers. Got mine this holiday and what a plane it is. I ended up mounting a 1500mah nicad to the back of the fuse. I added a plywood plate and velcro straps for easy removal of the battery. Engine choice is the O.S. 46 and 11 x 6 wood prop. Added a charge and on/off switch to the side. First flight was crazy. take offs were heavy on wanting to guide left. Allot of right rudder to keep it straight. Not right! I looked at the right thrust and mine was all washed out due to the motor mount bad install. I actually had a little left thrust!. After fixing that problem the Decathlon tracked very nicely down the runway and good take off with no issues. Flew about a half a tank and the engine was dying out. Made a dead stick landing on the first new flight. Plane had a nice glide and brought her home back to the runway with no issues. I ended up covering the right cowl port to increase the air flow instead of having an air dam with all the holes exposed. O.S. I read to have at least a 2:1 or even 3:1 air flow from the front to the exit of the cowl. I also enlarged the hole for the glow starter. Plane flew great on the next flight. Very easy in the air. I set the CG with the battery position at 90mm from the leading edge. No extra weight has been added. Plane is about 6.5lbs without fuel. I also used the foam supplied with the kit to wrap around the tank. I upped the tank size from the kit 8oz to 10oz without issues. I only should have gave a little more room for the throttle wire as its to close to the tank like I would like to have.