Thanks, I think I understand now. SC skips if not equal and before I was
xoring with null memory or something which is why I was getting bad
results. Works like a charm.

Incidentally, anyone know a good way to attach LEDs inside a case? I've
been using twisted pair crimps cut in half. Couldn't locate double
crimps that were small enough and reasonably priced. A friend uses
wrapping wire and bonds it with glue but I'd rather use the tubes than
get glue all over the place.

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