PV... What's the deal? Wy get all fussy about what I wrote when you didn't even address it in your post?

I said that VE is not linear. That remains true.
I didn't knock your work. Instead, I pointed out a simple flaw.
You've got lots of info but when one little thing goes awry, it throws out everything related to it. Think of it as working a 6 page math problem then dividing by zero. OOPSIE! There goes all that work.