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Hello. This is my first time posting on this forum. I have a Traxxas Blast, that I'm redoing. I've replace the shaft with there upgrade shaft to allow for 3/16 props. The brush less motor I'm using is Cyclon 4000 Marine. Rated at 3752 KV. Max amps it pulls is 60. Max voltage it will handle is 8.4 volts. The speed controller is Aquacraft 45 amp brush less. The manual that came with motor is suggesting <<K>> 36 {2318.36} prop. I know one they are suggesting is metric. My friend that doing boats for 35 years. Suggested to start off with Octura x438 prop. Any suggestion will be greatly appreciated. 