The Yuneec Europe technician - the same one that replaced my C23 camera - replied to my e-mail telling me to perform a compass calibration with the new camera attached to the drone. According to what he said on the e-mail, the C23 gimbal IMU levelling is performed when doing compass calibration and this means that the C23 must be attached to the Typhoon H+ while doing the calibration. I always perform compass calibration without the C23 attached to the drone in order to minimize stress on the gimbal motors while turning the drone; the technician told me to NOT perform the calibration without the C23 attached and to not worry about the gimbal motors going "crazy" during calibration.
Guess I have to take the Typhoon H+ again with me this weekend to perform the calibration on Lagada's football field.