Plastic welder: My new favorite tool.
I have same kit but branded differntly from ebay, works a treat. I am using it to weld my plastic sale planes that go around the rear window on a 74 as they are cracked etc. I have got a soldering plastic welder kit as well that i am getting pretty good at using. I use it after to smooth the plastic out and pretty it up etc
Those plastic welder staples make it very strong literally impossible to resnap.