Op zaterdag 13 juli 2019 15:25:06 UTC+2 schreef John DeRosa OHM Ω http://aviation.derosaweb.net:
When I bought my DG101 years ago (since sold) I wrote to DG asking if adding turbulators to the wings would help performance. The answer was a clear "no".

That's some work done for me
I guess proper sealing and the new wingtips would be the best way to increase performance, will try some proper sealing first.