Date Added: Monday 14 July, 2008
I had the same problem as Earl in his review with this. The spring loaded horn pin didn't make contact with the ring on the back of the adapter as it didn't sit far enough down the shaft. Manage to fix it by prising off the copper ring (not the plastic section it sits in) and adding a couple of layers of double sided sticky foam tape, this made the ring sit further back by a couple of mm extra and sorted out the problem. Bit of a faff but easy enough.
Rating: [4 of 5 Stars!]