Do it! When I last looked on YouTube etc. there wasn't a decent BWR servicing video; the only stuff I could find was strip-down videos of an ancient AW, and a really poor-quality French video with some bloke in his pants doing a partial disassembly of a BWR.
I have had a look for a video on opening it all up, do you know of any decent ones knocking around? It's the standard BWR hub.