As I mentioned previously I do not like the separate channels for the Elevator servos as you are intending.

Communications from the TX is serialized so moving up the channels introduces a slight delay.

e.g. Channel 1 gets transmitted, then 2, then three, then four, then five... etc.. so by the time you hit channel 8, you may have a 80us delay or more in play....

Normally this is so small that it is not noticible, but it does produce a big effect on the elevators.

Not so on ailerons because their surfaces tend to be thinner, and even if there is a lag, the leading aileron doesn't really affect the trailing one.... e.g. you CAN fly a plane with only one aileron working and hardly notice the difference in some circumstances.

With the elevators having one out of sync imparts a small rotational difference that comes into play during manouvers.... harriers, hovers, etc.

I know the newer JR TX's have a provision that minimizes this effect, where linked channels are transmitted in adjacent bursts.