Then I am recommending that everyone put a piece of 1/2" balsa triangle stock across the front of F1 where it joins to the top of the motor box and carry that out all the way to the edge of F1.

It's only a few grams of weight and, after looking at the plane, I can see where there might be s atrength issure when handling the plane.

This correction has been added to the "Known Issues" section of the online manual.

TF