Aye it's all a bit spherical innit? They need to get outside and try it for real. Moving a concrete slab or two on wooden balls is NOT a good basis for pitching for a research grant to go up to Scotland to get ten oxen to pull 40 ton stones on stone balls!

It won't work, trust me. And to suggest they could bowl along at ten miles an hour (which means the track pickeruppers and putdowners have to run forward with the bits of track at more than ten miles an hour, well.....