A 13oz plane with a speed 300? That's going to be fun! [img]i/expressions/face-icon-small-happy.gif[/img]

I've had some "fun" with epoxy too. On my four star 40 I was really really careful about aligning the vertical stabilizer. I had the fuselage sitting at an angle, with the front higher up than the back, so I checked it over and over until the epoxy was dry enough that it couldn't move. Then I came back a while later and of course it had slid slightly before the epoxy hardened completely (just enough that you can see it [img]i/expressions/face-icon-small-sad.gif[/img]).
I also fuel-proofed the firewall with epoxy. When it was dry I went to put the engine mount back on and oops! The threads in the blind nuts were clogged with epoxy. I managed to get them sorted out by heating them with a soldering gun and threading the bolts in and out.