So the Plugable Pro8 has arrived, Easy to setup, come with all the necessary cables and Display adapters (dvi plug on unit, adapter for VGA and HDMI).
Downloaded the drivers from the plugable website, setup the unit and then plugged in the Stream, drivers loaded and screen flashed a few times as the display drivers sorted themselves out. After a few seconds the Battery icon changed to a charging one and maintained charge at 100%. Plugged in my 2Tb Hard Drive (Stream would power this via OTG but drained the battery) and windows opened the explorer window for the hard drive, played a movie off the drive with no issues, moved files from my phone to the drive with no lag or errors.
Tested the display function using a Samsung HD TV, slight bit of lag running at HDMI 1080P (not got a cable to test that the VGA connection), the Pro8 relies on graphics rendering from the connected device so the 1Gb of RAM makes the display lag slightly, so watching HD movies might make the device slow right down and lag (VGA may be better).
Overall a highly recommended purchase, also means that now i can use my Itunes as all my music is stored on an external drive, the limitations of not being able to charge with basic OTG meant that before even with a hub it took too long to populate Itunes before the battery ran out, but now those issues are gone. So if anyone wants there Stream7 to have desktop type functionality then this is well worth the money.