Bloody ell anutz, 600mm breaker! Well if needs must I'll add that to the shopping cart as well, I'm sure it'll come in handy for other stuff.
And thanks for the advice about not being in gear - between my haynes manual, you and limax2 I think I'm pretty much ready to do this.
riedrider -
They say with the upgraded nut for your front sprocket you want to be at 90nm of torque. Other people on here seem to be doing 80nm due to worries about whether the threads on the driveshaft can take it. I'll be going for 80nm with loctite.