Had the same problem with mine and did the triangle stock reinforcement too. One annoying thing about my Spektrum system is that it cycles the retract channel every time I turn it on. If there's a way to get it to stop that, I'm not aware of it. It also seems to ignore the end point settings as well when it does this, so the servo is going maximum travel. Anybody else experience this?

Good shot of your wings and N-numbers. The gold pinstripe is a nice touch. Maiden flight this weekend?