Kooyoora early morning control pick. Reasonably clean except for one bad wobble when the pack caught me. I think the experience conforms Barr's law... that the IQ of a pack is equal to the mean IQ of its members divided by the square root of the number of members. The pack went to the wrong control site. I allowed them to drag me off my line and at the wrong site. Of course, with no markings, this was not going to be detected by the racing pack. I thought it looked wrong, so I tried to confirm the situation with a wander. With no control flags out it was a little like course setting... checking a number of attack points. The solution looks obvious with hindsight. It didnt seem obvious then. Sorted it out, got to the correct site and then found Andrew Cameron at the next control. See,s he realised the error as well. Good training.