Wow Ken, he's up and walking!
I would be inclined to throw the stump out even further so that it comes down where the heel would hit on the walk cycle. Also i would shift his weight even further onto his left leg/stump - really exaggerate it
I think there may be something up with the weighting on the chest - the top three buttons all seem to move together with the shoulders. I think it should be a little more gradual than that.
Course thats just my 2e worth - feel free to ignore it.
Chris