The hierarchy for the bone setup is shown below :
This is an example of the necks weight painting, interestingly each bone in the model has a different colour for weight painting making it easier to distinguish which piece your working on.
This After finishing the weight painting I began to play around with the bones to see how the weights were working, I ended up going back in to edit some of the transitions between joints to get the pivots slightly more realistic. It also became a challenge to make the accessory conform to the shape of the molefa as it changed in its different rollin positions.