[Vince]

I just about remember having to learn all sorts of calculations when I was at college @Doug – the one that sticks out was working out the surface area of the top of a cone that has been sliced at an angle.

But that was about 30 years ago so the actual details behind everything were forgotten a very long time ago!

One interesting job I remember doing with my dad was a circular oast house roof – for every three rafters in the bottom half there were only two in the top half.