I've got a friend with a rubber ducky collection and I want to attach some old 1/144 gundam model limbs to a ducky I bought and paint it to be robotic. The only thing I've thought of is super glue, but I'm pretty sure that that would be too fragile. I want something that will hold up. I'd prefer not to have to cut open the ducky, but if that's the only way to make solid attachments then I'll do it. I'd love some creative suggestions on how to go about doing this. P.S. I do have some of that hot mold plastic stuff, but I fear that it might come off if the duck is squeezed since the rubber is soft and the plastic isn't.