Has anyone calculated an estimate of how long before using an AP would make it make more sense to renew versus buy a new pass? For example, say your AP expires January 15, but you're not going again until May 15. Since it's 4 months before you'd use it, you might as well buy a new one, since you would only have 8(12-4) months on a renewal. However, If your next trip is February 15, a renewal gives you 11 months, making it worthwhile. I'm assuming there's some sort of "cutoff date" to make one or the other the better choice. Anyone know?