Kisssys,
Thanks! So it sounds like one option would be to leave a channel open on the AQ M4 and tell the Minim to use that channel and it would work.
For your battery voltage on the OSD, are you getting this via the on-board connection(s) or through Mavlink via the ADC on the M4?
Finally, I can't get my CharSet to update. I get an error when trying to enter "CharSet upload mode". Is it necessary with your provided firmware?