U-Know the establishment won't like this at all :-)
They will find any excuse to poo-poo it. They will do this without doing any 'maths of scale'. If you just do a 4 tonner then they will SHOUT VERY LOUDLY that that's only 4 tons, it would never work on a 40 tonner. Once a big name shouts that you'll have a real struggle to be heard ...