In the regard to thickness of the trailing edge, I have been told that
  aerobatics use a thicker TE to reduce stick force.  Can anyone direct me
  as how to design or where to study what the TE should be to be optimum
  for our aircraft.  On the Air Transport aircraft that I work on they are
  composite in construction and usually between 0.25 to 0.375" in
  thickness.

John,

 

You might try some Google searches on "blunt aileron trailing edge".

 

There is an indication that blunted aileron TE's increase the air speeds at which control reversal and flutter occur.