Motor cars were sometimes paired back-to-back for what was known as "E" trains. These were formed with two M cars acting as locomotives, hauling a train of typical outer-suburban or country stock. These ran to Frankston, where the train would split and two steam engines would take portions on to Mornington and Stony Point, and to Lilydale where the train would split and two steam engines would take portions on to Healesville and Warburton. These runs were abolished in 1958 with the arrival of the Walker railmotors, and operational practice changed to connecting trains instead of through-carriages. A number of swing-door motor cars had been specially altered for E train use, but in practice they weren't always available and so Tait motors may have been required as a substitute.