Sorry to scuttle off rudely last night, I was trying (and failing) to get to the haries session in time.
Now I can see we'll both be under pressure from son and husband at Elibank...
I think their running form might trump ours, esp with your propensity to spend time lying face down in terrain. I like to think that our navigational consistencies buy us a bit of a buffer though, and our rivals are both more likely to flounce off in a huff when the going gets tough.