Thanks kkx, I tried this on two valks, and combined with BlueMax's post below, I think it worked great I also first filed the knurled end, and then place the knurled end in the undamaged side when reassembling the shoulder hinge.  I think it worked great, just continue to handle the joint gently, and always lift it from below rather than pull it from above to get it over the notch.  Also, I ran a 1/16th drill bit through the holes twisting it by hand (ie not in a drill) to make sure the ho