Just had a quick look at this, tensioner pinned (hard going when you have a stage 2 AC tear), belt off, placing screwdriver down alternator... pulley locks both ways, so I asumme it's goosed (should freewheel one way shouldn't it?)
Regarding tools, can we just use a 33T Spline?:
or does it need the special £15 tool above to lockout... ordering pulley now.
Should turn this into a Alternator how to thread with all the questions.