I travel regularly up to Inverness to visit my daughter, and I even drive past this way to and from the airport. Looks like I need to make some extra time for a round - I'm up there on May 7th!!
As others have said, they key is to relax on the second nine when you know you're having a good round and you'll be fine - if you can hit sub-50 seven times in a row there should be no stopping you!