I tried to do that, but I don't have a pressure bleeder - maybe that is the problem. Using DIS and just opening the bleeders and relying on gravity may not cut it...? I wasn't really clear on whether it was required or not. The instructions refer to using a pressure bleeder to flush the fluid; but once that is done I wasn't sure. Could be for the sake of time, could be it is necessary I suppose.
Actually I see many tales of woe here on the forums, and I find myself a bit irrationally hostile that something every toothless hillbilly has done since the dawn of the auto has turned into a fiasco that many professionals cannot sort out properly (including some BMW technicians it would seem.)
I am going to try the two man 'pump & hold' method again, but this time with the engine running, and I am going to try and find a pressure bleeder. Not overly optimistic on finding that last one locally, but you never know...most seem to operate on vacuum at the bleeder rather than pressure at the reservoir; and I am not sure it is quite as good. Or, if I can find a spare reservoir cap, that would be great too. Now, if only I didn't have to work tomorrow I might be able to get this sorted out!