As you've learned, there is a technique to using epoxy. Just as you need to hurry with 5-minute, you have to do something special with 30 minute. You have to check a couple of minutes after it's clamped to make sure the clamps (or tape) haven't slipped.

The value of using longer cure epoxies is mostly weight and strength. 5 minute epoxy has no time to penetrate very deeply. It does grab the surface but that's about it. And it sets up so fast that most of the epoxy you've smeared on the joint simply fills gaps. Sometimes it creates the gaps, so it's nice that it does gap filling. But what you've gotten is a lot of epoxy going aloft that's doing very little for you. I try to wipe the excess that squeezes out from a compressed joint, and quit using 5 minute because so little showed up and what did was so easy to peel off the wood.

But you didn't ask your question to get a lecture on the benefits of slow curing epoxy.

If I were you, I'd fly go ahead and fly it. Truth is, that joint isn't much weaker than it would have been with 5 minute, if in fact it is weaker. The only consideration to flying it would be how it "fits" now. Are the retract linkages out of range now? Has the dihedral changed much? That could make the airplane look strange as well as make the landing gear struts angle out.