If they use a custom gearbox(that can handle axial forces) which is likely, they might have the propeller directly attached to output shaft. So they can loose the coupler. Might also have a shorter motor as well. Noticed that in their commercial they say they have smooth acceleration curves (which I believe is to make the gearbox last). But we will see, would be nice if it’s a direct drive, so much easier.
Yep we use a shorter motor, and we cut the output shaft and motor shaft, and have a really short adaptor between.