I can gladly state, that this program simulates missile behavior much closely than you think. (atmosphere, g forces on control surfaces, acceleration, overheating, ...) Around 50 dynamic parameters are used to simulate each missile.
It sounds like you have a model of pretty decent fidelity, then.
Of course, quantities like missile acceleration (G) limits are well-known and documented. But less trivial information such as lift and drag coefficients for the body, wings, and control surfaces, or even the aforementioned autopilot gains may not be so easily available.
Did your materials actually provide most of these parameters, or did you make engineering guesses yourself?
