you more than likely have found out to do your prop balance if not maybe i can help.Probably you're right. I should perform gimbal and props balance, but I don't know exactly how to do that... Ouch!
Thanks, this was my thoughts, my props have always been so close I never really need to do anything, but thanks for the gimbal info. I've seen where others have posted to do so however as I stated I haven't seen anyone showing how.You will need one of these to balance your Yuneec props. From my experience with Yuneec props they are balanced perfect from the factory so the likely hood they are out is very slight unless you have chipped them then they would need to be balanced.
Precision Prop Balancing ROD for YUNEEC Q500 Units
You should also pickup a Du-Bro True-spin prop balancer. They are the best for the job.
DRUBRO Tru-Spin Prop Balancer
As to balancing the gimbal its not going to happen. CGO3 gimbals can not be balanced like the newer CGO3+.
Like I said I would be very surprized if your props are out unless they are chipped or after market props.