I was running my newly upgraded BL2 when I thought about the horn hook couplers it came with. I've actualy come into contact with them within a few weeks now, starting with the discovery of the Hustler in a S.F. hobby store junk box. I know the Hustler could have been made at least as far back as the 60's probably, but my increased encounters with them (a few TYCO cars and the old P2K's) have made me more curious about them. What I have gathered about them is that they were said to be a great idea, but they failed for a reson unkown to me. Can anyone help me learn more about them?