Hey, have you written anything with boots as the tranformation/change trigger?

A few. This is probably the best one I can offer you: http://brackenousjunk.tumblr.com/post/153446868508/pigtail-2-of-2-the-physical-changes-were

You can also check a few others here, which mention or involve boots in some fashion: http://wesleybracken.tumblr.com/search/boot and http://brackenousjunk.tumblr.com/search/boot