I had asked some questions in post #8, two of which were regarding the props.
After seeing your pics I no longer need answers to those questions. The red props are certain death. They are cheap for good reason. They break easily and any sudden wind gust can bring down the aircraft. In addition, if one breaks there is immediately higher stress placed on the remaining props causing them to fail in rapid succession.
In your pic I see 6 hubs but only 8 out of 12 blades. I suspect some of the missing blades are far from the point of impact because they broke during the flight. I also see a difference in the way these props broke compared to OEM props. Yuneec props tend to break cleanly when they hit something solid. You can see a clean break on one prop below. Also notice two props did not break but show abrasions from hitting something less solid. Then look again at the red props. No sign of abrasions but still broken.
It's sad that companies make these cheap knockoffs. The resulting cost to the owner is significant.
On a related matter, I am sending you a PM.
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