Excellent questions Dmitry!
I probably won't find time to answer these questions.
I think an NSR wiki would be a great place to store answers to questions like this (no pressure Andy )
But for now just searching the forum works not too bad.
I too have seen that black wire and wondered...
Sorry for what is basically an unhelpful post.
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[color=#808080][size=9]Yes,.. I too know how to waste Time and Money,...