Glad to hear it, glad to hear it. And you can call me Jeb, I don't like to stand on the PhD.

Well, it's the price of trial and error isn't it? A functional spaceship, you don't learn much from. And when you simulate something, you're at the mercy of your computer model. That said, I think I've learned a lot of lessons about aerodynamic pressures, launch windows and rocket engines from my designs, failed and successful alike. Right now I'm working on a new engine design, but I'll bet that's in there to.