Posted for Charlie Kohler <charliekohler@yahoo.com>:

 I agree with Terrence and Brent,
 I had several days with Martin Holman inspecting an airplane, and we
discussed the holes added to the IV fuselage for A/C.
 I suggested that adding reinforcement should take care of this problem, and
he disagreed. He said nearly the same thing Brent said,  Holes---"will have an
effect on the torsional stiffness of the fuselage. This, in turn, effects the
natural frequency of the empennage. Making the fuselage less stiff by
decoupling the window (holes)  reduces the empennage flutter margin."   
  
 Charlie K.
 See me on the Web at  www.Lancair-IV.com