First, congratulations to your wife and you. Your son must be the best Christmas gift you have ever received.

I have only read your post quickly as I have other work to do around the house, but I think I understand now what you did. A small problem I'm having deciphering your diagrams is that they are labelled in French. Are your axes labelled differently? If so can you complete this?

X =
Y =
Z =

OME