Does anyone know whether the ND round leather gear knob, milled stalk and gaiter is interchangeable with the NC’s?
Information online seems to vary with some saying all versions have the same thread, 10mm x 1.25.
Considering MX-5 Parts sell this I would have a stab at yes, they are interchangeable 
Gaiter might be a bit more difficult without having two to compare (which I would have been able to do if we weren’t in lockdown 
).
If the MK4 gear knob fits a MK3:- MX5 Parts £75.47 for the MK4 knob & another £14.17
for the Legend ie. the the gear location indicator.
If we find that it fits all cars I am going to see if I can 3D print a 5 speed legend as that would open so many options up!
That’s pricey…
Anyone know the weight of the nd gear knob?