I've just signed up. I've never done a 100 before and had been gearing up for the Ken Laidlaw as my first one, but decided to go for the Perthshire instead. It's half the ascent of the Laidlaw, which in the end I decided was a bit too demanding/daunting for my first 100. It’s a week earlier so will probably do the Laidlaw 50 as a training run for the Perthshire event. Looking forward to it already.