Thanks to my metalwork teacher at school, oxyacetylene torch welding of steel I could do, if I had one, alternatively big nuts and bolts could form something sturdy... but I'm not convinced that any of the clamps I've found thus far are suitably strong enough - clamps with jaws the right shape to hold bikes are plastic, not steel, and none seem to open wide enough for my particular bike's frame tubing. I'll stick to my ceiling hoist for now. If the jaws of this "Rusta" opened wide enough, I'd screw it to the end of a bench, or bolt it through a big piece of wood and clamp that to a bench. It's rated for 30kg allegedly, and the bike wouldn't have far to fall, if it's a low bench.