Building a 5" gauge battery-electric loco. Six huge axle-hung motors. Yesterday I wired the controller, checked if both bogies went the same way and had her roll a few cms up and down the bench. As the car batteries are quite heacy and had to go in and out several times during the process I used small 7 Ah lead-acid batteries. The car battery clamps would not fit these so I used alligator clips to connect them. Running to and fro without load was no problem but then I had the bright idea of checking how much power the loco had. I leaned against the buffer beam and let her go forward. *Flash of light* *lots of smoke* *electric smell* The stall current of each motor is higher than 50 Amps. Six motors vs flimsy alligator clips. A few patches of melted insulation inside the loco, nothing left of the wires. Clips were still in place. Will test with proper batteries this week.