I went to the AMR Website https://amr-rc.com/en_ca/airplanes/a...s.html?brand=8 and was greeted with no less than SEVEN stick models. From 84 inches of wingspan to 144 inches WS. While it _MAY_ be acceptable to have 1.5 pounds of ballast in the 144 inch monster, it would definitely not help in flight performance.

There is only one place where vibrations can come from in an airplane. THE ENGINE. While there may be little we can do to the engine itself, then we have to do the most we can do to the prop and spinner (depending on size) to alleviate the vibrations.

I am developing a sick feeling in my stomach. I've been around for a while and I can recognize the feeling. Someone may be over their head in their newest aircraft. A Stick is a far-far cry from a trainer. And one that needs 1.5 pounds to balance correctly is a very dangerous plane indeed.

I don't mean to insult anyone, I call them as I see them and I may very well not have all the information required. I apologize in advance and will modify this post if necessary.

Rafael