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.