[TonyDuell]

My normal way to repair such plastics, assuming the plastic dissolves in dichloromethane ('plastic weld') is :

Put the bits together

Run a brush dipped in dichloromethane along the cracks. Hold the parts together but don't squeeze them hard, you do not want to force all the softened plastic out of the join

Cut a piece of thin cotton fabric (e.g. an old dress shirt) to fit over the repair. Put it in place, then brush it with dichorlomethane and force the fabric into the softened plastic.

The result is normally strong enough for any reasonable use. I can't remember where I got that trick from but it's not original to me.