Rich,
Your second flight, ok, second landing, experience is almost identical to mine. I actually landed it very nicely on the first flight, brought it in kinda hot, put it on the wheels and chopped the throttle. That worked great except I was down the runway pretty far and I was running out of room. I literally stopped with the prop in the weeds at the fringe. The OS 120 has some impressive weed wacker potential swinging a big master airscrew!

On my second flight I went around what seems like 100 times setting up for the "perfect approach", all was going well but just as I got close, and I mean real close, it must have stalled because mine did the whole sudden stop back flip thing also. In my case the Robostruts compressed (I had softened the springs) and the wheel pants plowed which was obvious from the damage. The struts twisted back up into and through the wings just as you described. A new wing kit and a set of pants and it's good to go again, though I'm waiting on changes to our field before it flys again. Lessons learned....first, fly it in and only throttle back when it's on the deck. Second, don't soften the springs in the robostruts! They may seem stiff from the factory, but this bird can put some serious weight on them when it comes down. (mine have new factory springs!).

Steve