Hi all.
Had my Funtana 90 set up with a Saito 120S and an APC 16x6 prop (the 16-4W over speeds the engine). Yesterday, at my 7th flight which was still very moderate, at low control surfaced rate, my left-hand horizontal stab was torn off, along with the elevator.

It happened at straight and d leveled flight, at less than 50% throttle.

Is anybody familiar with such tendency of this plane? Prior to this mishap it flew marvelously, hovering effortlessly at less than 50% throttle.

Any comment will be welcomed.