30 minute epoxy might be fine but JB Weld when it comes to carbon pushrods steel or titanium ends is the tried and true adhesive. If you've never worked with it, it's similar to 2 hour epoxy, takes awhile to setup, (sticky as heck), but really sticks to metal and carbon. You should be able to find in any good hardware store. Buying a package is worth it even to just experiment with. It's good stuff.