Have you tried them for overhands? I just can't see how something that stiff could survive long thundering in from 300 out onto a piece of granite, which happens in my area. I have watched firebirds completely taco on impact
Not saying they aren't interesting.
That is indeed a harsh circumstance, to be sure. While I've not done exactly that, I have hyzer-bombed them into an asphalt road from 300' - off a tee pad that was about 100' higher than the road my Walking Stick torpedoed into. I've repeated that mistake, on the same hole, 3 times
I never learn.
Yet, the disc has survived with nothing more than a quarter-inch flat spot along the edge. It didn't splinter or chip, just sort of got a tiny bit flat and spread in those small spots. I just squeezed it with plyers when I got home, sanded it a bit and reoiled. I had to do that the first time and the third time I threw it into that road, the second time It only had a small scratch.
Don't get me wrong, it made a really loud and resonant "bonk" when it hit (which was cool because it was far enough away to have a 2 second sound delay) and I was scared that I had really f'd it up... until I walked down and picked it up. The damage was small enough that I just kept playing it the rest of the round.
You can see that same disc pictured on my post from 03-02-2013 at 02:57 PM - the Walking Stick with the brown flight plate.
Now, the worst damage I've ever done to one was throwing my custom prototype driver a similar hyzer bomb that got away from me and came down in a rough and jagged rock pile. That left a gouge about 1/8" in from the edge... but it still didn't chip or splinter. For that one, I just sanded down the roughness and reoiled. Still flies and the damage hasn't become any worse.
Overall, my best comparison is to say that these are not as tough as Champ/Z or Star/ESP plastic, but much tougher than the DX plastics. The positive side is that they never "taco" or warp and they're flight never changes from being "broken in". It's the same disc today as it was 2 years ago.