A good tech article there mark,
I'll have to do mine one day, in need of some cash to buy the seals from a local bearing suppliers. Mines just a little oil weep, it drops a single drop of oil on the deck after a good ride, so I can live with that for the moment, if it gets any worse though, I'll have to pull my finger out and do it, but it seems like I've got to buy a press though. It shouldn't be too hard to make one, by looking at wuputt's press though.
Mick.