I have been doing some reading on mods you can do to the Cessna 172, 182, etc. And the Piper Cherokee series and notice how the addition of gap seals on the flaps and ailerons as well as different wheel pants and on the Cherokees some enhancements to the wing can give the airplane as much as 35 MPH extra speed.
I am wondering if anyone has had experience with these types of mods on there airplane, and how they have affected the handling qualities of the airplane, and if they just gave it better speed or if it made the climb better or runway performance better also.
A friend of mine has a Mooney and they installed some new performance stuff to the wing on it and she reported that the handling quality was not the same, it was faster but didn't handle as good in slow flight or stalls.
Any help with these questions would be appreciated, and if the increases have been as good as stated by the manufacturers