Repair plastic Reinforce items, fill holes, stong bond tips hints
Superglue or crazy glue as it is sometimes called will make an extra strong bond if mixed with baking soda (Bicarbonate of soda)
So if you have a hole or indentation in almost any material that needs filling have a go at the following.
Place a few drops of super/crazy glue (Fluid not Gel) in the hole/indentation and while wet, add Bicarbonate of Soda. Then add a few more drops of super/crazy glue. This will set and become extremely hard. You can file, drill etc.
Be careful a chemical reaction takes place immediately and creates a lot of heat in a very short time