I assume you mean the 7C 2.4 Ghz version?
I helped a friend set up his Dual elevators on a QuiQue 72" Yak. Futaba has had a Dual Elevator mix for quite some time, but I first saw it on my 8AUPS and 9CAP. It is called Ailevator. It is designed primarily to allow you to mix Ch2 and Ch8 for Right and Left Elevator halves. The 7C 72Mhz version does not have this but the 2.4 version does. You can use Ch5 and Ch7 for Ailevator and Ch1 and Ch6 for Flapperons. It is much easier than using a Programmable Mix.
http://www.rcgroups.com/forums/showthread.php?t=1013838
Ailevator also allows the Elevator halves to move with the Ailerons, but I do not know anyone that used that feature other than to test it. Most people turn off the Aileron component of Ailevator.