Hmm. I definitely agree with your logic, but I'm sure I read something by Sheldon Brown along the lines of pushing the pin out and back in weakens the join because it's no longer as tight a fit as it was from the factory. And so you should use the split-link that comes with the chain (at least that's how I remember it). I also thought the thinking behind them was for people who like to remove their chain regularly to clean it, so they don't have to break links all the time (I don't come under this category). Other thing is I've shortened the chain to get good tension, so if I wanted to use a standard link and push the pin back, I'd have to either shorten the chain by one link (doubt I'll get away with that), or replace the split-link with a standard link (which means the chain will contain two pins that have been pushed out and back in again, which is surely worse than only containing one). So what's the consensus on split-link strength/ what I should do? Confused now