I am clueless as to what you are talking about Richard, I dont own a Tourette!
As I recall the steel hood frame on my Mkc and D were made of flat steel bar.
Just in case any Americans are reading this thread you do appreciate that a hood is a canvas roof and not an engine cover? , that is a bonnet! I remember some years ago when I sold a certain American museum owner the BMA Hazelcar, I mentioned that it didnt have a hood, he angrily replied, why are all English people in need of a Lobotomy!, [yes quite rude really!] what good is a car to me with no hood?!!! After which I explained that the car had a bonnet but no soft top. He climbed down but by then the damage was done!