Because there are only 8 channel in PPM mode of Futaba MZ, Spectrum modul/receiver for Futaba MZ only 8 channels availible. Is it possible to connect 1 or 2 Futaba MPDX-1 8 channels expender to Spectrum 2.4GHz receiver and expend channels to 15 or 22 ? I have download the manual of this channel expander and found it can work with G3, 1024 & PPM receiver, so I think it may be compatible with Spectrum module and receiver.