Larry, for one, I never use 5 min epoxy, I know you don't either. I will use 15, and 30 minute epoxy most of the time. But for the areas where I need strength, I only use System Three T-88 Structural Epoxy. I had a mechanical engineer who tell me about it and I really, really like it. I have used it throughout the Avenger Build. I get mine off of Ebay for about $25 or so. Seen it on Amazon, Aircraft Spruce, etc. for about the same price. Chic