(none needed) ;-)
That's for considering my thoughts to be valid (I wasn't sure). ;-)
No, as you say, ITRW there are too many other variables to be able to predict too much accurately. ;-)
As a parallel to that, I had a habit of accidentally spoiling peoples 'surprise' presents when I felt them (though the wrapping paper).
So, daughter, thinking she would trick me, made up a present that looked like and was the exact same size, weight and feel as a Toblerone bar and gave it to me with the 'right, guess what this is then?'.
I held it and rotated it about it's centre and 'noticed' the turning moment was wrong, with most of the mass being in the middle, not spread along the entire length so I said 'It's not a Toblerone bar'. ;-)
Bless her, she had weighted a Toblerone bar and made up an exact equivalent weight with 2p pieces but stuck them all together in the
*middle* of the triangular box. ;-)Cheers, T i m