There was nothing wrong with this great design, as said prior the S35 was the pinacle but all other models were streets ahead of other lighties.
The only small problem, which may have accounted for loss of someTail Surfaces was that when repainted the tailplane was Paint Weight Critical. Paint had to be measured and weighed acuratly for equal distibution on both surfaces or Tail Flutter could be expected. I have a feeling there may have been an AD regarding this problem but not sure?