About time you joined the club ,very nice , i like Dans top mount .

My Medusa 1600kv is 36mm and just clears the brace with 14t-15t pinion . Not sure on the Neu finned size and will depend on the pinion as well .
What size pinion are you going with ? The larger the further away from the brace the motor will be but then you will have to be running a low kv motor .