I have Cabrio history, A3 cab - nice car, but seriously flawed hood, and this is the same design. My advice don't touch it there will be lots of long term issues......
Also when you go topless you compromise on stiffness (fnar fnar), weight and hence handling. Thus a GTI cabriolet just isn't right.
When buying the A3 I went 1.8t (sweet motor) instead of 2.0t as the later just exposed the A3 chassis (wooden and flex on cab).