Thank You LouW for your input. It is exciting to see back and forth discussion on the aerodynamics of the plane.

As for the CG, I think it is on the spot. The way i found out is through landing, I have been told by trainers that cg is best checked as it flares for landing. The cloud dancer has been the easiest plane to land. It flows so nicely at idle and makes a perfect 2 wheel touch down with barely any impact.

I believe in Dave's theory, nothing is ever perfect. I think of myself as a very exact and perfectionist and yet i did mistakes with this plane.
Thank you Dave for the Links they will help tremendously. but let me update you on the outcome of the recent flight.

I added a pair of washers under the engine mount (since the engine is mounted side ways). The washer thickness is 0.75mm which contributed to approximately 0.9 degrees. I know that is not much, but still i was doubtful of adding too much.
The Result:
The plane still had some ballooning effect. but again slightly less.
I check for throttle line alignment slightly different than your process but i think they both give the same result. I trim it at half throttle and then crack up the speed and observe the plane. In this case it is going up: "ballooning effect"
But i noticed something really important. As i cracked the throttle up, it didn't just go up but it rolled slightly to the left. After landing it, i noticed that the wing and the stabilizer are not parallel. So first thing i will do is shim one side of the wing to have it parallel to the stabilizer. This will most probably fix the slight left roll.
Another thing, My landings were not as perfect anymore. It could be me. since i am only a rookie, or the wind, or the added down thrust in the engine. The landings were acceptable but with faster descent that made it look a much harder landing than i am used too.

Next, I will fix the wing level to the stabilizer and then go through the Guide that you sent me and try to identify the possible reason.


A side issue: My knife edge is horrible, the plane holds for a second and then the nose dives fast downward. Even with full rudder and full throttle. I might be doing it wrong, but not that wrong. But yet again maybe it is too early to start with such maneuvers when i don't have the plane properly trimmed. And the engine can not lift the plane into a vertical flight. Could that be the reason?

Thank you Both Dave and LouW for your input .... keep them coming

Regards

Fadi