Ducttape to the center console or door, Chris? That's so ghetto. My wife would give me "the look" for about 10 seconds before and 2 hours after she tore it off. <img src="/images/graemlins/smile.gif" alt="" />
I think the keychain model is ok and works fine on the keychain. Otherwise, I'm using something a little more "official" to anchor it down than ducttape. I've found my spouse much more forgiving of things that look permanent vs. MacGyvered. In fact, sometimes she doesn't even notice. But duct tape and untamed zip ties are a dead giveaway. <img src="/images/graemlins/grin.gif" alt="" />
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Experience is a hard teacher because she gives the test first, the lesson afterwards.