Full-scales are usually designed so the -inevitable- flutter is beyond the speed capability of the aircraft.
They seldom survive flutter. It's over and done with so quickly the part falls off before the pilot can respond.
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"Always try to keep the distance between the servo arm center and linkage attach point as short as possible and the aileron horn as long as possible. You'll have to use maximum throw available on the
servo to make this work. This arrangement gives the servo the mechanical advantage rather than the aileron."
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I don't do it this way. I use the outermost hole on the servo and the surface. This reduces the potentail for slop in the holes to contribute to flutter. The further out on the servo arm, the smaller the influence of slop.
.001" at 1" is less proportionately than .001" at .5"