Type & Dimensions of Airline rails in boot of SW (moved to interior)

After a wooden mockup I'm starting to build the first aluminium rail support in the back of my SW.
And now I need to be much more precise when ordering the aluminium rails.

So my question : is there somewhere an exact (CAD) drawing of the airline rails, including distance between them ?

I get 88.8cm as distance between them (with my old eyes), which is suspiciously close to 88.9cm = 35 inch.
Also I get a distance along the rails between two (arbitrary chosen) holes as 40,6 cm which is again very close to 16 inch.

Can someone confirm that the rails and distance between them are indeed in inch ?

I did only find CAD drawings of the EU airline rails in mm dimensions so far.
Does anyone have a reference to the ones INEOS is using ? that would be great.

Thanks !

Turns out it is faster to make the CAD drawings of the airline rails by myself than finding them online.
I included a STEP file of what I will use for my construction.

Please Note : Check the dimensions with your own Grenadier, as I'm using a CAD program only once every few years.
Not an expert, not even a competent user. Use at your own risk !