DM800SE USB TV stick installation problems

For the life of me I cannot get a USB TV stick to work with this box running Open PLi 4.0, I've tried two RTL2832U sticks, one with the R820T tuner, the other with a E4000 tuner. The drivers do not seem to be available in the standard Open PLi drivers list so I've tried all sorts of others downloaded from various sources but feel like I'm going round in circles to be honest. Any help would be appreciated.

DM800SE with RTL2832U / E4000 tuner combo working fine now. No go with the R820T yet and no luck at all with any of the sticks with a DM800.