Spirit System

How many custom channel assignments are supported on Spirit Pro? I have assigned 6 (besides the 7 standard ones), now there are no more empty slots coming up. Is there a way to assign the the remaining 3 of the 16 Sbus channels?

You can assign all 16 channels.
For the basic features just 7 channels are available, while for the special features the rest.

I think he mean that you can only add 6 special features in the "receiver channel mapping"
so is 7 + 6 = 13 mapped channels total

or I am doing something wrong

Yes, that is what I meant. Once 6 special functions have been assigned, there are no more 'empty slots' available for the last 3 channels.

Wow, I want to see how you are controlling all these channels using your transmitter's switches/controls.

I am running an FrSky X10S on OpenTX with the SBUS receiver protocol.