One more thing, you seem to talk few times about how you put lots of money to this idea.

Well, it can be a two bladed sword in some cases. Have you thought, maybe because you put so much money to this, you would have harder time admitting if there were any errors in your model? No offence, just a thought!

But on the other hand, I think you have just shown that you *are* willing to adjust your model, by changing "ferrite" to "iron" in some cases, where it works better, so there we go!