I do like the torsion box idea, it looks like it could be fun to play about and build something unusual and cool with but for now I have a whole other mountain to climb. I have to learn to build, set up and operate this machine.

I've not done any welding in a few years but I work in a brewery and we have a TIG plant that no one can use, since there's always some fabrication job needing done I've enrolled in a welding course. So building this will be practice, it was even suggested I could built it in stainless but that seems just a hint over the top.