The thread has drifted a bit away from the original topic! One of the problems with sim fidelity is that the requirements (including the recent FAR Part 60) are pretty bad as far as helicopters go. No low speed fidelity appears to be needed as just one example. AFCS modeling likewise not given much emphasis.
Should we start a new thread on what's wrong with simulators from a technical (as opposed to instructor) point of view?