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What a shame . Thought you had the broken bits.
I like 2:1 marine epoxy as it even sticks to Gel-Coat so most plastics are easy :)

Are the scales celluloid ? If so, I believe they will weld with Acetone. IIRC Charlie (Spazola) has done this. Shoot him a PM
The epoxy for the liners is a good idea but personally I'd use 24 hour...