Thanks for the input there. I did not experience this on the 55cc version but could be from it being bigger and a bit slower in its moves. If your fix holds up then please let me know and I can make changes to the drawings. Otherwise I have a different idea that could help solve it.What is happening is when you are doing violent snaps at very high speeds the following happens the wing is extremely strong and stiff and also the fuselage with both having carbon tubes. But unfortunately all of these forces are focused into one location and that is were the wing tube and the fuselage intersect and it is only 5/8 wide. So what happens is that the hole in the fuselage gets enlarged quite quickly, and the balsa around the wing gets compressed . Next thing you know is that the wing is loose.
Still working on the changes depending what happens on the next few flights will decide to leave the changes made or put it away and take a long look at it over the coming winter. The changes I have made are not proven yet.