removing alternator rotor from crankshaft

[Jonesy :-)]

You've tried shocking it with a few well placed and weighted hammer blows? Yes?

[Clutch]

Ok, I'm looking for tips on getting the rotor off to replace the crank seal. Have got the screw in puller but it don't want to move and I don't want to do any damage.
A few searches only brought up the us site where they used heat on the rotor first.
Gas axe is on standby .