My Openbox S9 still sits in the operating position along with my microHD. The S9 works more reliably to drive my motor through a long 200-foot RG-6 run. Perhaps it's able to source more current or its current output is more poorly regulated (just guessing)? The S9 also delivers SR 45000 channels on 15W which the microHD cannot. Finally, I still like the ability to connect to my S9 through my home network for channel database manipulation and off-receiver backups on my PC.
I personally have had good luck using C2HS2-11-12-13:0481CMT. I believe it was distributed as DEEP_C2DS2_CMT_1112130641.rar. However, I only use Ku band. I've read that overall a good version is SkyBox_S9_CMT_110717.rar. Many firmware versions are located
here. Standard rules: 1) Save existing transponders list first, 2) Upgrade firmware, 3) Reinstall backed-up transponders list.
These versions fixed the S9 timer issue to allow the clock to run relatively reliably and therefore its DVR to be used. You leave the S9 powered continuously for best performance. I can pause or replay live TV and record the same as the microHD can.