Gee, LOC tubing, LOC motor mount, G10 fins, fiberglass reinforcement...that doesn't sound like a stock Big Bertha to me.
In fact, it doesn't even sound like Skill Level 1...
My point about RockSim is that it won't filter out bad data and you can tweak the settings to show amazing performance in conditions that you will never encounter in upstate NY. And you can specify construction materials and components that don't actually exist in reality. RockSim won't mind a bit. I'm just suggesting that S-D use some common sense, that's all. No one who has responded to this thread has actually seen his design.
At 4500 feet, he'll be extremely lucky to even see the puff of smoke from the ejection. I'm not arguing against the project; in fact, I'd urge him to go for it. It will be a great experience no matter how it turns out.
A few years ago, I lost a 30" long, 29mm minimum diameter rocket on its first flight on an F25. It had simmed to 4500 feet, too. It disappeared from sight at somewhere around 1000 feet. We had several spotters, but none of them saw or heard the ejection charge fire. (It would not have been loud enough to hear from a distance of 4500 feet, anyway.) Despite that, I don't regret the experience one bit. I made some friends during it, actually.
MarkII