For the past few years I have been recommending the Avistar as a trainer because of its versitility in teaching the rest of the maneuvers pilots should know after they solo. But recently we have had a few of them break the dihedral brace connecting the wing halves resulting in wing failure in flight.(Students put some pretty big stresses on wings.) Upon inspection the plywood dihedral braces seem kinda punkey...not at all like 5 ply hardwood should be. Has any one else experienced ths problem? At any rate it you know someone putting and Avastar ARF together I would reccommend replacing that part.