These should become named channels to avoid the confusion in #870 being repeated.  One nice thing of making this object a bit smaller is that now we can maybe be overly descriptive of the channels, even if we don't use all of them.

E.g. collective, accessoryN (perhaps a different name for the accessory inputs versus the UAVOs, such as auxillary like a lot of transmitters say), flaps, gears, etc.