Had tail failure on mine but luckily when it landed the wing was in one piece. Weston replaced the fuse FOC. It was hard to tell what failed in the tail section on mine because it was in that many pieces. But I definitley had some flutter on the ground and even on the new fuse there was a lot of flex in the balsa fuse in front of the stab. I put in thin ply with lashings of epoxy but the other Hype flyer in the club soaked the balsa sides (just infront of the stab) in cyno. We both put balsa tristate on the inside above and below the stab. I was paranoid at this point so I put tristate on the outside as well. Looks ugly but I'd rather have a model that stays in one piece. Have flown about 15 times now and am loving it. Had to peel back the covering to put the battery just being the wing bolts. Think I might have to do this again.