JOhn, I feel your pain. I get very frustrated with poor repro parts as well. I've had more than a few 3eunit drums that weren't quite right and required some careful trimming.
I plan on doing the coupler spring repair one day so I hope someone can point the way to a vendor who has quality parts. I know I haven't gotten a bad part from Jeff Kane at Train Tender, so you may want to give him a call and get his opinion. He will definitely stand behind his part for sure.
Mike Sacco
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