How do you know that your measurements are either accurate or reliable, or even relevant? You are the one burying your head in the sand, because your experience of using active ATCs is "limited" -- I would say "negligible".

You have your own little K9 project which you've invested thousands of hours of your free time in. No wonder you imagine that they are better than the real thing. As I said before - don't try the real thing, whatever else you do.