I am fully aware of that, I am an ardent coaster enthusiast and have been for around 10 years, I'm very aware of Intamin track make-up. That is why I said "Anyone else seen the size of the
spine on the lift hill track?"
I also knew exactly the reason why the spine was built up in such a way, as a design engineer, I go through very similar processes day to day.
You'd have to be blind not to see that on top of the huge bracing structure, there is a section of lift track off to one (I think the left hand) side of the structure, and pads for bolting the catwalk on the other side of the structure (the right hand side). So this will only have one catwalk.
Example: