OK, trick time for gluing with epoxy. When I have to mate two surfaces with epoxy I always drill a big bunch of small holes through the two surfaces so when the parts are clamped or weighted the epoxy flows through the holes to the other surface. Really adds a better grip. While I'm tricking I may as well tell it again, fire walls always get some holes drilled through the fuse into the fire wall sides then I use cut down tooth picks and epoxy them in. I have had some hard crashes that have busted up the fuse but the fire walls were still hangine onto what was left of the fuse sides. I have a dental hand piece on my bench with a lot of dental burrs of all sizes and found one that is a perfect fit for tooth picks.