Noam,
Let me flies more times and i tell you about Super Tigre G 90, i have an old Super Tigre .60 for about 10 years and now is on the trainer of my sun...

Leviva
Believe or not, i used std. Hobbico B:B: servos, i used the same servos on an Extra with Quadra 41cc for 2 years...............
I put a short arm on the servo and the elevator hight rate move 35% ruder 40% (on Extra i put 1/4 scale on ruder) and the CG is rear, i´m not a professional flier, Epsilon is VERY LIGHT, for my style of fly, its ok.

Sergio