RE: Picked up my 1st gas heli, advice? Shuttle SCEADU Evo
REVO or Revolution mixing adds or takes away pitch from the tail rotor in response to changes in collective pitch. That is, if you add collective you would need to add a bit of tail rotor to keep the nose straight.
Its a thing of the past with heading hold gyros, infact it will do nothing but cause you problems.
CCPM mix is a type of mixing with 3 servos directly attached to the swashplate 120 degrees apart around the circle. If there is one servo that moves the collective pitch then you don't have a ccpm heli.