I use image BH on flash, and OBH,Pure2, Opendroid7, etc on USB using OpenMultiboot.
For information, I also use another Rx (OctagonSF8008 and Dinobot4K Pro) Previously both device can’t locked Optus D1 because of hardware limitations of the tuner only support SR 45000. Then I asked to the engineer to solve the problem, and solved. They modified on software side, modify parameters on dvb-module.
From this reference, I am sure you also can solve the problem .
Thanks mate