Aileron trim servo location

[William McClellan <wilmac@gte.net>]

I am getting ready to put the MAC S9 servo motor into an aileron for
trim.  Where is the best place to put it?  At the tip more leverage is
gained and a smaller tab can be used but the XS aileron tip is flexy out
there as it is a good way from the outboard hinge.  What is the best
size of trim tab?  I know of one XS that is flying and it works well
being placed near the middle of the port aileron and is 1 3/4" X  9".

Thanks,
Bill McClellan
A164