Yea, the 9 channel notation on the Spektrum module for the 9C/9Z is a mistake, it only has 8. The Spektrum models for the JR 10X have 9 channels - for the same reason the ones for Futaba have 8, the 10X is only a 10 channel radio in PCM mode. When you put it into PPM mode (necessary to work with BOTH the Spektrum AND Futaba add-on modules), the 10X is only 9 channels. If you want more than 8 channels from Futaba on 2.4 GHz, you'll have to wait for the Futaba TM-14 module for the Futaba 12 and 14 channel radios...

Bob