About this 3D model

DON'T TRY TO FLY THIS UNLESS YOU REALLY KNOW WHAT YOU'RE DOING!!! I haven't flown one yet; there is a lot more work to be done before sticking a rocket motor in this thing and going zoom. Even if I build one that flies, that doesn't mean it's safe for someone else to do it. Lots of stuff can go wrong, and the last thing you want is a pointy PLA or ABS projectile coming at you at 200MPH. In short: You'll shoot your eye out kid. All that said, I've done some modeling in OpenRocket and this basic shape should be pretty stable. I designed it with the classic D12 motor in mind. Since this is 3D printed I have complete control over the dimensions, so I decided to not use a traditional motor mount and instead sized the body to hold the motor directly and added an open bulkhead to hold it in position. I aimed to balance simplicity, mass, and stability. I wanted to create the smallest, simplest rocket I could that would still allow me to use a D engine. OpenRocket claims apogee of 893ft and max speed of 169mph with an Estes D12-7. I've included the OpenRocket files I used for simulation. It isn't an exact match for the model, but fairly close.