Sundial, where exactly is the knot? Is it close to where the achilles attaches to the heel or is it higher up, more like where the achilles starts if you were referencing the portion closest to the knee as your starting point? Or someplace in between? Is in more in the muscle above the achilles?

And do you have any numbness/tingling in the lower leg or foot?

And yeah, what Knott said about the wedging.