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That's just incredible. Thanks for posting this information.
my compliments--never gave it much thought because I have never actually seen it. Your answer was certainly better than what I offered. Excellent work and my apologies to Efficient Admin for not researching the issue.
No problem Larry. I did the same thing - didn't research it and I thought you had a good answer. I thought there was a trick to it, like a retracting sword but as Rachael pointed out, it's more complicated than that and really incredible!