If you have concern about your ailerons you can make laminated ones ..use 1/8" ply sandwitched between fairly hard balsa sanded to shape....Also if you pick your aileron stock pick hard wood..Its harder to twist..I have built several Tigers and I have never had trouble with flutter...I use the two servo system...I think the Tiger 11 plan has torque rods and the Tiger 60 has Two servos ...I think on my next Tiger I am going to put torque rods in and have flaps as well as dual servos in the wings...I did this on my Ultra Sport and it work's very well...