My rivet extractor weighs near on 100g, stripped down to its minimum. I really begrudge that, so I've never taken it. And never needed it, fortunately. But is there some way of just bashing out the rivet of a knackered bit of chain with a rock and a toothbrush or something? I've experimented with a hammer and a sharpened masonry nail but no joy. Can then sort it with split links I DO carry.