Ghazzy can't disembark?

So, this is purely an observation I made, and I don't know if it has been talked about before, or if there is any official ruling that covers this, but Core rules say to disembark from a vehicle, the model must be set up wholly 3" of the vehicle. (New) Ghazkull is a bit of a chonker, and sits on an 80mm base.

As a red blooded American, I don't understand those silly British measurements, but according to Google, 80mm comes out to roughly 3.15 (3.14961) inches. So technically, rules as written, Ghazkull can't fit wholly within 3 inches from a vehicle to disembark (or embark for the matter, but he can start deployed in a vehicle). Obviously, most players would just say that as long as he is right up against the vehicle, the .15 inch isn't enough to make a fuss, but I could see a particularly sweaty competitive player using that against an Ork player.

Purely out of curiosity, is there any official ruling for this?