I use both a walker and a wheel chair. Wheel chair in my office at work and walker around my apartment. This seems to be an injury that heals for a while then it stops for a while…..I have numbness as well but no clicking. At least not at this time. What I do have is a lot of pain in my knee especially at night. What works the best is elevating it and arthritis strength Tylenol. Oh by the way you are so right the external fixator did cause quite a stir with people that visited me!!!!!!