Less than an hour later, and it works like a champ. Your advice was absolutely spot on, JP. One plastic piece of the coupler was broken in half, the other lost two of the pins, and the rubber middle piece was shredded to bits. Not sure how to repay you, but thank you very, very much. If you ever need computer advice, I'll try to check these forums from time to time and lend a hand if needed.
John, July 2006