The Sea Queen was built from an Aerokit Kit and ran for awhile with brushless SSS5694 motor on 4S and it was too fast, so decided to do something about it. Since I have given up running Nitro for more than two decades so I have put a Zenoah 20cc ETI on the boat. On test run it ran okay with enough power, the best thing is that it has smoke and sound to make it more fun.