Oh farking blah blah blah then! haha
IMO and always has been, for Big Targa anyway, they NEED to allow 6 tyres purely on safety and duty of care grounds. With the event getting longer, it's simply dangerous to have people of bald, illegal, against the law tyres when traversing the wet west coast.
Pretty simple really. and I'd be completely amazed if they reversed their prior rule.
having said all that though, I enjoyed the challenge of getting through on one set...... it added another dimension to the competition