Shoot! Unfortunately you'll have to settle for anecdotal evidence. It looks like his toes don't really need to move much anyhow, so I glued that sucker on. In all likelihood it will fall off again, and if it does I will update you accordingly.
Gah! The thing's toe part immediately broke. Its held on by just a thin ring of plastic. I don't think its fixable. I'm so bummed. I wish returns to Amazon JP weren't such an expensive hassle.