ime thinking about making a very larg ship about 9ft+ i plan to use a 2chn rado with it to keep costs down ime going to use 2 maby 4 33amp 12volt slead lead batterys if i can i want to make most things myself i have a transmitter and all the wires and things im thinking about using car relays to and mirco switches to operate the motors i might consider making a tug also with a operrating time of about 4 hours with to batterys not sure yet lol any iders i just come acros a load of free sled batterys and the firs thing i culd think of is a big boat