Thanks for the inputs--I'll take a chill pill, and play it by ear. Our first pass through last year had numerous C&I exits leading after a short walk to Security. Last time though, I seem to recall exiting C&I and immediately being in the security line. Not having pre-check then didn't matter as we had received the dreaded SSSS and couldn't avail ourselves of PreCheck in any case. While I could have booked via CLT instead of MIA, we get an extra 2 hours in SXM returning via MIA, so the extra time on island is worth the hassle of MIA.