just got a new two pack of bnsf rotary dump cars. the couplers are dummy and thats the way the old ones were. this couplers how ever would not work one my other cars. they fit together ok, but would not allow the other car to close and lock the nuckle all the way.
grinding the front of the nuckle a little flatter solved my problem. now they work fine with any car coupled up to them. dissapointed that this had to be done on a brand new car though.
