Wow! 2cm is an impressive difference! I only ask about the source of the problem because from what I have gleaned from my experience if the leg length difference is a symptom of another problem, you can make the orignal problem worse by "chocking up" the short leg. However, if the leg length difference is the actualy source of the problem (as was my case) "chocking up" the short leg has wonderufl effects!   My very first attempts involved just buying a bunch of those cheap foam insoles from t