There's so much margin for error that you can't make a scale based on it and claim 'facts' of any kind. Why is that scale better or more accurate than Magic Al's or Deffpony's or gtaalex's, which are based on...you know... real evidence?
I never even sad they were better than theirs. Gosh, I want to do a realistic face-desk right now, and risk having my important body parts or bones fractured.
You attempted to make a new scale, and it's different to their scales, the amount that you've been posting about it leads us to infer you believe your scale is more accurate. If you don't even think your scale is accurate, why not say 'I don't think my scale is accurate because it's a guess' and then stop discussing it?