Yes, have gear box, This motor i buy from England, but HK also easy to find,
I calculate the ship size and use scale motor and gear box with BB500 and gear,
U can find some 540 motor in HK also good, cos Tug boat not use too high speed motor, but sure not use 2XX motor, sure burn!
about 50% parts buy (superstructure and some decoration), hull self made and electronics parts in HK / England.
But buy from England , my experience is the england person not want to sell and not polite, and the delivery charge very expensive, 10kg HK$950... hahaha
But interesting is i can self made parts and use some their drawing and decoration, building time need half to one year.. quite happy ga
Test water leakage -- OK
But my minor mistake-- make big problems (not fixed the nut to universal joint tightly--- finally damge the universal joint...CRY)