How to add unique classes to FlexSlider slides? (default behavior in v 7.1.x - not in v 7.2.x)
OK - I was over thinking this. This script will add id 1, 2, 3 etc to my slides. The slides are just list items - I was all intimidated because only one li is visible at a time, but jQuery doesn't care...

/*Script for assigning each flexslider slide a unique class*/
(function($){
$(document).ready(function(){
    $('.slides li').each(function(i,el){
        el.id = i+1;
        });
    });
})(jQuery);