A few weeks ago I bought 3 old Bachmann rolling stock, two are 51' Box cars and one is a 51' Reefer. The couplers did not properly connect with my new cars (there was an angled tip sticking out to the left of each coupler preventing it from working with the new rolling stock that I have) so I figured I'd just change out the couplers...wrong. The hole in the old couplers is smaller than the hole in all the new couplers I have seen available. The hole I'm talking about is the hole the screw goes in to hold the coupler in place. So when I got the new couplers home and tried to mount them, the screw (head) is too small and the coupler just falls off. I hope I'm not being to confusing here, lol. There is no info on the boxes that tells me what these old couplers are so I can't really say what I have here. Just wondering if anyone has had this experience and if so, is there such a truck available that will work on these old cars? I made the couplers work by cutting the angled piece of them off that was keeping them from working with the new couplers, but I really would like to get some nice metal wheel trucks and couplers that would work....(properly) if not, no great loss. I bought them for $3.00 ea. I know this post is a chore in itself just to read but,.....just checking, and hoping someone has run in to this before.