Today I received from Germany the new DVB-S2x tuner which as you may know also supports MultiStream channels and of course DVB-S2x channels.
IMO now the HD51 capabilities surpass the SF4008 for features and maturity of drivers, I particularly like the multiple partitions for real fast multiboot
Partition 1. I have OpenATV, 2. OpenViX, 3. OpenViX with Kodi and 4. the new OpenPli 6 RC.
Not really interested in Kodi on STBs as it's poor compared to my FireTV 4k but I had spare partition so.....
OpenATV and OpenPli are good for comparing and troublshooting.
The HD51 now gets pride of place as my main STB, undecided whether to hang on to the SF4008 or sell it.
I'm using this USB tuner for cable, seems to have new drivers and works better than any other cable tuner I have here.
Forgot to say if PV is your thing then certain capabilities are built in to the driversCode:http://www.hauppauge.co.uk/site/products/data_292e.html