 There was initially some experimentation with bogie trucks (including attempts to electrify the original cable car chassis) but it was quickly decided to standardise on new 4-wheel trucks.Most of these early cars had originally been open top, but most were modernised with top covers and the later survivors also received vestibule screens and enclosed balconies.The last open top car was scrapped in 1934 and the final ex-Leith cars were withdrawn in 1936, but some of the converted cable cars remained in service until 1947.