My second test of the Ranger EX QuadPlane had an added air speed sensor and an upgrade to APM Plane v3.8.0 beta 5. We took off in QSTABILIZE mode which worked perfectly into the 14mph breeze. The odd noise during initial takeoff was a passing motorcycle. Just after transitioning to FBWA mode, the plane wanted to pitch upward and loose control. I quickly recovered back in QSTABILZE mode and repeated the test. On the ground, I re-tested the control surface compensation and it was correct.
Back at home, a question from Cala had me looking at the Q_FRAME_CLASS and Q_FRAME_TYPE parameters. Apparently, the firmware upgrade changed my Q_FRAME_CLASS setting from 0 to 1 which means hexacopter not quadcopter. Without yet looking at the logs, this may have been my issue in FBWA mode.