RE: cap 580 flatout
I used epoxy (sparingly) for much of mine. Mainly, for the carbon tubes, and where the braces pass through the wing. I managed to have a plane that weighed 8oz. w/cdrom power and a 2-cell batt. I think that CA is just too brittle for those things. My Cap was a pretty nice flyer...unfortunately, the wind took her straight in recently and it was a write-off. You can't crash these things very hard.
HTH
-Jeff