Hello everybody. Thanks to Santa Claus, my oldest son is really into HO trains. A while back, one of my friends gave us a Rivarossi 4-6-6-2 GG-1 electric locomotive he had as a kid. Looking at the paperwork that was in the box I believe it dates from the late 60's. I don't think it had the correct couplers on it. I tried using Bachmann universal whisker spring couplers and two other types that I found on eBay that would supposedly fit the locomotive. The latest order was from IHC for a #6 large hole short shank coupler. That one fit in the mount but the whisker spring didn't fit properly ant the coupler wouldn't move back and forth when coupled with other cars. I can't find any part lists online for that particular locomotive. I also checked the Kaydee website and couldn't find any replacement. Any help/suggestions will be much appreciated! This is a picture I got from the internet. The coupler in the picture is not what is on the locomotive.