I gotcha. My sister was the same way. Her, I was totally frustrated trying to measure her because she liked has ties on all levels. 1/2" difference in Torso and Leg ratio, we kept getting different readings on her fingers, and her legs were almost exact and I was trying to make sure I was doing it right. There are two bones that stick on on your upper shins and I wasn't sure which one was right. I know for sure now, after watching the video, but even still. I don't think she's going to go on it at this point anyways. But we'll probably go through it again sometime.
My wife is a teacher and she's still on the fence about if she wants to switch. She still thinks the GTD is more about losing weight, but I need to get her to read the Teacher profile to understand more. Her family has a history of cancer all throughout her family. Both sides. Dad, Grandma, Aunt, etc.