Re: tying hardy flies.
Gordo, I did some hunting on the internet and I can't see why/how zap-a-gap is better for our uses than other CA glues. CA stands for CyanoAcrylate, and this is one type of "super-glue" available. Just make sure to get a glue of that type and it should work just fine. The CA stuff seems to usually be in plastic containers that you squeeze rather than squashable metal tubes.