In addition to all the good stuff already posted, I'll add this.

Much of the confusion in the term CCPM (well defined by Rotor) is what some call mechanical CCPM, which IMO does not exist. Not trying to start an arugment, just trying to clarify the subject for Rcag. If you are controlling collective/throttle blade pitch with a seperate channel, and it is not Mixing with the cyclic blade pitch signal, then there is no CCPMixing going on.

By pure definition, CCPM is electronic. And mechanical collective pitch control is Non-CCPM.