OMS,
Just as a small aside - it is the fitting of a 'plastic' fuel tank that is believed to be the problem in the Grand Canyon accident: the same one fitted to all the DHFS squirrels.
And I agree, the thread makes fascinating (or should that be frightening) reading, particularly those inputs from Tuc, Chug 2 and Rigga, but also beggars the question 'why did MB roll over?' Or have I missed something