Good point Chuck, I've had good success using JBWeld on plastics and even Delrin, if I can mange to encapsulate or simply surround the part to be glued. I think the epoxy has very little sticking power to the plastic, but forming the epoxy around the part (assuming he can do so without interfering with the mounting process) is a method I have used often with good success.
I love that stuff, especially the JBWeld for metal - an added plus is that when you mix the two parts, one black, one white, you can see when you have a proper mix done when you have an even, gray color. According to the manufacturer, a not-so-thorough mixing process is the largest cause of failure of their product
