Hijacker,
I think you are right on this one, it may even be 30 days. However, I know if you string together 180 days, you get 90 days to report back to the company. Thus, if you are on a rotational style basis with your unit, you can just bumb it for a few months before another 90 day set comes available or you find more MPA from somewhere else. For my unit, the goal is to string 180 together, take a break or find something else without having to hastle with a checkride at the company and then leave again. I think all parties involved are just happy when we stay military for longer periods of time. Now, back to the question at hand, just kidding.
Thanks for the input, I guess I will be real active duty again sometime in the future, not reserve active duty, damn, hate to give up that shield.