text: No. 1 was returned to its manufacturer where a set of trailing wheels was added to reduce the rear overhang , and the springs on No. 2 were adjusted and the crank pins shortened to reduce its oscillation .
simplified: No. 1 was returned to its manufacturer where a set of trailing wheels was added to reduce the rear overhang . The springs on No. 2 were adjusted and the crank pins shortened to reduce its oscillation .