I would afirm most of the above HOWEVER I have seen some GP PT 's with questionable wing strength(no reinforcement fiberglass on center section) & resulting in folding after dozen flights. also the angle of attack on the wing is quite a lot & If I recall the wing tips are excessively "washed out" to counter tip stall. this results in it flying on less wing than if it were built more along the lines of othe flat bottom trainers.