I like my homemade huaraches but I have noticed that in use, my feet slide so that the knot seems to end up uncomfortably just under the end of my second metatarsal which is presumably exactly where I don't want it given that I have a slight mortons toe. As I have a pair of xeros on order, I don't want to have the same issue with them. Any ideas? The xero sole is a bit thicker than the rubber I used so it may not be an issue.