It would be worlds faster to make a pose to apply to the character that locks the offending parts in the main character.

Your boot is basically a knee brace that would lock shin twist and side to side.

If you are going to use side to side, it will have to rotate (and bend) the thigh part around the thigh for it to work right.

---

Some things are easy to explain, other things are not........ <- Store ->   <-Freebies->