Cheers chaps will take a look at some of these routes but not likely to dive into fusion at moment.
Unless it's easy to get a finished result...

@Brian- I presume setting the 45degree line at a length greater than the widest 'stroke width'
of the letters should cover most shapes and mean minimum extensions required....

Btw...i also challenged a friend (autocad expert user)
with these but he was not confident he could do any faster.
Work in progress!