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.
Nice! This kit came with a smooth "paddle" as well to melt and smooth-out plastic pieces, but I haven't gotten around to using it yet, as all of my repairs have been done from the backside. But I'm sure something will come-up eventually.