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Hi Phil....sounds like a severe case of "extracting the urine" but thanks for the thought.
How can this one be considered tricky with a bright yellow face that requires the wearing of a good pair of sunglasses just to look at it. I remembered seeing it will going through old postings. The name I couldn't remember, but I remembered that it was found in muddy tire (sic) tracks on a construction site...so I typed in those words in Forum Search and found the thread.
Paul and Stephane would have got this easily without my input. I intended to say so in reply to Stephane's..."Nothing to add".

Diplomatically Yours :D
Supernova B) To the North of Scotland....Invisible from the Western Isles ;).