Thats strange, because years ago I broke a cable, ordered new, they sent a SN cable, it was too long, tried reversing, no go, thought I had put it in backwards....... called them up, they said send it back, they sent me a RN cable. No Issues...... I could have cut the SN Cable and rethreaded, but did not want to go that route, maybe it was just defective, This was in 2004 or so.