I have been told that the FF6 and the 6x is the same thing (don't know how true this is, as I don't know the radio), but I did find this in the FAQ of the Futaba website:

"Can the 6X do CCPM? If so, which swashplate type do I need?

The 6X non-supers do not have CCPM programming and it cannot be created manually using the mixes. Non-Super radios (ie. 6XA, 6XH) cannot be upgraded to supers. There is no way for the 6X non-super to do CCPM.

The 6X Super (ie. 6XAS, 6XHS) has CCPM programming covered on page 53 of the manual, feature SWSH."

-- http://www.futabarc.com/faq/faq-6xsuper-q557.html