I've seen a lot of tour operations and almost as many different ways of managing infokeys. I use what Segway calls the "Dovetail Adaptor":
I probably have 30 copies of the other (lanyard and blank) adaptors because I don't use them. It occurs to me that another tour operator may have a similar stockpile of the one that I need and might want to sell them or swap them for the ones that I have?
I'm sure that I'm not the only one who doesn't want to pay $21.95 for the one little piece of plastic that they want out of the docking kit! (Yes, I'm an SEC but my direct price isn't much better.)
Thanks.