There were a few other things to reassemble having got everything back from the platers.

Handbrake 'swan' pullers;

PAS belt tensioner;

PAS pulley back onto the PAS pump, after cleaning the outside of the pump.

Press a new bearing into the auxiliary belts idler;

And install the circlip. Looks like the yellow passivation missed a small part of the object. Probably an air packet.