We must be patient but it quickly becomes very FUN!
By cons how to contact customer service?
Malgrés adjustements of the TRIMS, the drone from across (to 8H to be precise) and on the radio trim (front / rear - Left) seems not adjustable. I may have made a bad manip I do not know ..
If someone who wants to buy this model I discuss all ears.
Instructions in English (And very lean info)