Hi to you All,

Mystery solved !!!

The Zen of the H9 Edge was found when the plane and the ground became one... Just kidding !!!

And the winner is... Mr. sport10; ...While doing this also check the curvature of the leading edge of the wing for uniformity. If this wings leading edge is not uniform in shape it can cause the situation you are describing.

The main problem was the uneven curvature of the leading edge.

I noticed that the to leading edges had an uneven and different profile so I peel off the two leading edges and re-sanded both trying to math a combined profile of two different ones, as you can understand there was not enough material to work out a perfect even profile new on both wings but I do my best. The results were amazing I have a totally NEW & DIFFERENT EDGE this one can land on three points without any wing drop.

To resume, I didn't tell you this before but I was really disappointed with the quality of this ARF, at the assembly stage I found out the hard way that one aileron was about 5/32 in length because I hinged it in the wrong wing after that I had to modify all the stab and rudder support because nothing was fitting in place so I carved out the solid balsa blocks and use fiberglass to mount the rudder and then glued carved blocks for covering the fiberglass work, and this last just confirm it not mentioning what I found on the leading edge after peeling it off.

The quality of my H9 Edge 540 ARF is really poor and for sure its not in the line for the money they ask!!!

Thanks to you all, each of the tips are very helpful
Joaquin