The ones above that CFH has shown first are better than the second ones in his post for one simple reason. The bottom ones rely on that pin to tension the spring (you can see it with a flat screwdriver slot on it) whereas the ones above are tensioned by the spring sitting against the main body.
I have both, love them both, but lost one of the pins out of them. merlin replaced them under warranty, then I lost a pin again, by which time chicken cycles are no longer the importer, and extrauk (quite rightly I suppose) didn’t want to do owt, as I had bought them before they took over the product line.
I managed to bodge a wee screw and bolt assembly in there, which is holding up for now, as I can’t bear to throw them away. Awesome pedals, quite chunky and prone to catching on stuff, but brilliant otherwise.