I have an F56 3-door JCW. I thought it was a touch bigger than my ND, but if you’ve looked up the dimensions then you’re probably right. I feel like I can fit the ND anywhere I can fit the F56 but that’s a bit vague, I know.
Can you get an ND from your nearest Mazda main dealer for an unaccompanied test drive and just bring it home to try for yourself?
I’m willing to park almost millimetres away from things in my own garage, but in one I’m unfamiliar with - not so much, sorry.