In 1968-69 a further ten Motor cars were delivered. At the same time, some of the Units were reduced to BT-M only and allocated to the Sandringham Line, and these actions together allowed for the formation of additional M-T-T-M blocks so that eight-car trains could run on busier routes including Lilydale, Belgrave and Glen Waverley. Later platform extensions permitted operation of eight-car trains on the Frankston, Pakenham, Alamein, Upfield, Broadmeadows, St Alans and Williamstown lines. Occasionally, M-M pairs would also be used on shuttle services between Dandenong and Pakenham.