AI-1 and AI-2 Gunwales: Flat Space Length?

My roof racks are spaced 45" apart - so whatever AI I buy would need at least 45" of flat space between the iakos on the gunwales to be carried upside-down on the roof racks.

Obviously not a religious issue - but upside-down has it's attractions.

Looking at the photos, I'm thinking "No Problem".

Edit 2015 08-21 21:19:

Just got a chance to measure hands-on.

No Problem. Plenty flat space there.

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2015 AI in "Dune" - "The Grey Pig"
2017 Trailex 450 Trailer
Pre-September 2015 cradles
(anybody want to buy a slightly-used AI SpinKit?)
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My opinion is that after you tried that inverted car top a few times (sounds like an enormous hassle), you would decide that the centerboard knob was not a good reason to rule out the AI2..