Crochet just doesn't cut it.

Sorry, JJ, I can't believe that!!    But science still can't tell me why I found it satisfying.  Yes, I suppose that the fact that I was brought up a stone's throw away from Paddington Station in the steam-engine days might have something to do with it, as might the fact that my brother and I had a sizeable model train layout as lads, though he took it far more seriously than me (and still does), whilst I was more into the Minic that worked in tandem with the rails.