Hello. This is the first post on this site I'm making outside of the "New member welcome" part, and I intend on getting right down to why I'm here: I would like to know of any possible designs or methods by which to build a mechanical ankle joint capable of holding at least 500 US pounds, and balancing itself in such a way that it would be possible to attach such a thing to the bottom of say, a stilt, and it would would be capable of simulating the human ankle's lateral flexibility as well as the normal "Heel/Toe" movement. This seems to be a reasonable place to ask about something like this, or if it's even valid mechanically, as I am not very knowledgeable in this field. This is for a personal project of mine, and I would very much like the help of people who know more about mechanics than me. Feel free to ask for more information if necessary, and I will provide you with it so long as it's actually reasonable. Thank you.