Lego german class 52 condenser tender (11w)

This is the tender of the German military locomotive class 52 made from Lego bricks. Four axles are driven and one is not driven. The three fans on the top are powered by a mini motor from Mould King and are 3D printed, as are the M wheels of the bogie. The electrical functions are controlled by a Mould King battery box with proportional output control. The remote control is homemade with three switches and one potentiometer instead of two joysticks. The original model of the locomotive is...