ORIGINAL: 3DAP

I have been reading about a latency issue with using channels 2 and 8 on dual elevator set up's.
I am wondering what can be done about this. I have the same set up using 2 and 8 as ailevator
and channel 8 seems to be slower. I know I have linkages and mechanics of control arms set up
identical. I am just wondering if this is a common problem and if I mix another channel rather than
8 if I can have better luck?