From these pictures I cannot see that the back edge has been ground. Surely that would still leave one side heavier than the other no matter how careful? It seems a very labourious way to fiddle with a perfectly good sword that in essence still only cuts on one edge? and make lots of temper altering heat? Also it is not as if supplies of forged double edged kaskara blades were in sort supply. The answers can only come from far more pictures.
