Thanks dude and yes that was what I thought had been said, just that the degrading of downzaps appeared not to be occurring a few weeks ago on some posts I monitor, but maybe now that's been fixed, or it was a misunderstanding on my part.

As I understand it, if up and downzaps half - life is 4 hours then after say a week any previous up/down zap balance should be virtually eliminated to close to zero.

Even after 2-3 days it should be minimal...as long as no further up or down zaps have occurred.