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I don't know any posts references but these two seem most appropriate and have worked for me:

1. If the parts still (almost) close around the knurled Al hub, fit the plastic parts and apply very little very-low viscosity superglue. Use epoxy in case of gaps between plastic pieces.

2. Chuck Harris came up with this brilliant suggestion a while ago: Pre-fit the plastic pieces around the Al core. Carefully heat the core to just soften the plastic and press plastic parts further in (use either fingers or an elastic band or such thing). If deemed necessary, apply a small amount of very-low viscosity superglue afterward, between core and plastic.

Raymond