any wire works as long as you can solder it. 12 14 gauge noodle is the right way to go for flex. if you use stiff wire then it will break after flexing. if you plug you control for 1 mil a second in the wrong way, its toast. plug the battery in the wrong way its toast. plug the speed control in to the receiver the wrong way they are both toast. take your time. a to a b to b.