Looking really good Ben,
With regards to the rotors I would insert an edge loop down the middle of the rotor although slightly off to one side. Then bring down the verts along one of the edges as the rotors are a bit like a sword thick on one side sharp on the other. they do tend to be fatter at the very top where they connect though so you may need to add more detail here.

Keep up the good work though and am sure you will be able to get everything to match up in after effects.