The new FASST can mix the two elevator servos, it's the old 7-C that couldn't, like Dead said, it really ticked off a bunch of people. The set up is in the radio instructions but if you have any problems you can go to the Futaba web site and look in the FAQ section. I too use the 9-C and still go there once in a while for some info. I print it out and have it in my instructions, Futaba left out some info and put it on there web site.