It can be done if youtry.
would you believe in 1982 I won a Heli-Boy 40 at as a worker at a contest. I couldn't afford to buy any other radio, so i put my Futaba 6 channel radio to work with it. After trying to figure out the mechanical mixer, that I never got to work, I hooked the collective to my flap servo. I flew it by adjusting in as much "flap" collective as I thought I needed and added power. After a few adjustments, if flew great. I could land by reducing power, or collective. It was generally a step down of each a little at a time. I later used this same setup on a Shuttle and it also flew great. A bit awkward compard to todays radios, but I tried it, until I worked it. When you think of it, real choppers are flown the same basic way, Good luck and remember, the radio really doesn't know what you put it into. By the way. After forgetting to turn the gyro on several times, but flying just fine without it, I sold it.
Let them that don't want to work for it, rejoice in not getting any.