Why would anyone need more than 6 channels on an airplane?
throttle, ailerons, elevator, rudder, landing gear, flaps... and then what? smoke? night lights? twin engine seperate throttle control?

It is rare that one would have all these features together on the same plane, and if you do then you have a special need and yes you will need to buy a 9 or 10 channels model.
But the sad thing is that manufacturers strip some features from the 6 channel models to force you into buying the higher models. I specifically feel the need for twin elevator, twin rudder, twin throttle, and twin aileron synchronization on my X6102.
If I were to have these facilities, I would never buy a higher number of channels in the future.

Why can't they include this sync feature on my model? It works with twin ailerons and 7 channels receiver, I am sure it could be made possible to add twin elevator feature on the 6102.