Gunrunnerjohn,
Thanks for your reply. I don't have any special plan in mind as to replacing the lobster claw or the entire coupler. I am just trying to come up with a permanent solution to the couplers not holding which is the case on five of the six cars. I would prefer to avoid the rubber band solution. I only mention Kadee because I have heard they are good but I have never used them. I have pictures below. Thanks.