I kept a folder of the upgrades I did on my page (www.facebook.com/media/set/?se…. Annoyingly I haven't produced a guide on the feet to my recollection but I can always whip one up if it would help? Basically, they're constructed from Wonderflex formed over plastazote to create the curvature. The toes are styrene formed in a sandwich of craft foam and Wonderflex (as are the heel blades), and the whole ensemble is attached to the boots with locking nuts. As for the boots themselves, the heels were sanded to create the curves, and the texture was formed with hot glue. Hope that helps! Looking forward to seeing the finished costume.