yes, only my lower legs are affected.
Upper legs,hands, arms, and proximal are all unaffected.
I have had the numbness for 3 years. That also progressed slowly. Not sure if you have numbness or are familiar with it, but it's very strange. The numbness is in my feet, stops at the ankles, yet I can feel If someone touches my feet, I can feel the pinprick and vibrating tool that the neurologists use.