Yep! your right there Richard. I've just been looking at my track, which has a mushroom head on one side and a sort of pressed formed head on the other side. Must have been done in the factory with a large press? I would think that any pin removed in the field would be replaced with a split pinned link pin. Interestingly the 3 foot length of track that I just disassembled had all split pinned pins. That's what through me off track( No pun intended) Ron
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