I really wanted to use these on my Sig Mid-Star 40 but they are just too big (I bought the 1/8" ones) I measured the strip aileron material thickness and the length of hinge needed to keep two barbs (the minimum recommended length), and then calculated that the hinge hole would break out of the ailerons. I will still use them on the elevator (1/4" thick balsa) and maybe the rudder (3/16" thick- only leaves 1/32" on each side [X(])

The ailerons are standard 1" X 1/4" tapered aileron stock.