Without help available from Yuneec, You will have to decide which options to pursue. If you are sure nothing mechanical changed at about the same time as the firmware upgrade, we can continue to pursue firmware as the issue.
There are two main thoughts for the firmware:
1.) Install the gimbal fix firmware. Did you ever install the firmware from Post #8 ("camera image shakes (video encl.)")?
2.) Downgrade to previous version:
Downgrade is possible using SD cards. It requires a source of the original files. I do not have a complete set of files for Build 784. There is a Build 777 available that has the EU version, but I have no history of either the issues or the benefits of that build.
You mentioned an interest in firmware version downgrade early in this thread. If you are still interested, we can certainly try to assist.
There are two main thoughts for the firmware:
1.) Install the gimbal fix firmware. Did you ever install the firmware from Post #8 ("camera image shakes (video encl.)")?
2.) Downgrade to previous version:
Downgrade is possible using SD cards. It requires a source of the original files. I do not have a complete set of files for Build 784. There is a Build 777 available that has the EU version, but I have no history of either the issues or the benefits of that build.
You mentioned an interest in firmware version downgrade early in this thread. If you are still interested, we can certainly try to assist.