The majority of online volume kiltmakers in North America it seems require only three measurements to be taken: waist at belly button, hips, and length. That’s it. Given only these three measurements, do they take a guess at the waist measurement at the straps? (One would think that's really critical.) How far down are the straps (are they assuming a 2” rise)? How about the length of the fell? What if I have a high butt/bum? For an in-person kilt measuring (not really practical for most), what extra dimensions (if any) do kiltmakers take?