You will love X4, we fly now 1 Year with koaxX4,
and all our copters going to this Solution...
also the SJ is X4, and our own frames.... X4 or X 6
and with Herkules III it works perfekt, KW4 for max. Up to 8-9 kg
and with KW10 for up to20 kg...
and Zenmuse Z15 with X4 .works perfekt,
so have Fun with this setup
achta