I, too, suffer from that common hominid ailment so little know to manufacturers of sports headphones (gulp, I sweat), and have never had a set last more than six months. I also have an appalling genetic defect which means that my ear holes are not the recognised standard size. My current ploy is to bulk buy from Poundland (of course I wear a bag over my head when I do this), and just shrug and replace as needs, but I am sorely tempted to follow up your recommendations Tim D and Simon Jones 58. Many thanks for that.
I shall go off now and try to evolve a proper way of keeping cool and some proper ears.
I'd follow Cougie's advice. Additionally, if the shoes serve you well in the race, I'd put tthem back in the box and reserve them for future races (assuming Edinburgh is not a one-off), and so avoid your dilemma in the future. (You could keep a running total of the mileage you do in them on the lid, to give you an idea of when to replace thhem.)
and thanks for the very useful information about the course.
Like several of you, I shall be looking for a GFA qualifying time for VLM. Won't be attempting to keep you company, Clive, but the 15mins per lap is an extremely helpful indicator. If I understand rightly, about 16 mins per lap will see the rest of us dip under 3.15, and I'll know I'll have blown it if you lap me.