Just got a Stronglight Fission Double Activ Link:
http://www.stronglight.com/stronglig...sionDoubleInox
Apart from having to remove the bearing from the RH cup in order to install it (it had obviously been on a display bike) it wasn't too bad to install. Did near a rubber mallet to re-seat the RH bearing and tighten then loosen and tighten the LH crank arm to make sure the RH bearing was fully seated. Now this is done, the bearings feel really smooth (much smoother but a bit stiffer than the old Octalink stuff IMHO but I understand this is normal for an external bearing.)
The instructions aren't very clear but I got there in the end.
Alistair