your not likely to change camber once set right. plus that is why i said just blob weld on.
some adjustable shocks for the centos come with holes already elongated.
you dont reweld the hole. just get the camber where you need it and tighten the bottom bolt.
I never actully welded the washer on mine. drilled the bottom holes out 3mm bigger (iirc) and when we got it on the alignment machine, the camber was spot on.
Camber bolts fitted in the bottom strut holes will give greater camber adjustment than when fitted to the top hole due to axis?? Or would they be the same??