Hey a simple piece of ply through the centre into the stabs would help a lot.
ORIGINAL: lavi rider
It looks like the whole structure is made out of Epoxy and microbaloons / earocell .....no built up structure is present i.e composite laminate combined with structural ribs or spar to take the load....it's a miracle it lasted that many flights prior to failure.
Makes one wonder what is hiding under the skin of some these models.