Fair enough, I’m happy to contribute what I know.
To Foxtech’s credit, they shared the responsibility for the crash and have sent me some replacement parts for 50% off. Meanwhile, while growing impatient with the abnormally long shipping times, I repaired my Nimbus by making a new nose cone from EPP foam that came out of a car bumper. I also used EPP to replace crushed portions of the fuselage. New servos and props, and I was able to launch it again last week.
It crashed again. At 30 meters altitude, I switched to FBWA, it got unstable, and headed straight for the ground. Remarkably, my EPP nose cone was totally undamaged, but the EPO fuselage is a mess.
I’m not very good at interpreting logs, but I suspect an in-flight reboot due to excessive power draw. When I downloaded the Flash logs, two KMZ files appeared: One in Qhover as it climbed, and one in FBWA as it descended. Could this be that the Pixhawk Cube re-booted in flight?
Anyway, I really appreciate your inputs about the tail servos, and I hope my contributions are helpful.