Smile
would you like to comment on what you know re this topic? 
I don't know the answers and don't want to spend hours searching and analyzing the data...
would like to hear your or anyones comments.
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"I have marveled often at the thin line that divides success from failure and the sudden turn that leads from apparently certain disaster to comparative safety." Ernest Shackleton, Antarctic Explorer, Sea and Land, 1874-1922.
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