Chieftain as a name is a good choice. Some might get a little bit twitchy about the MBT connection, I don't have any problem with that side of things but if you look up the word chieftain it means the leader of a tribe or group. And given that most are familiar with Scotland and the Clans plus the historical connection of the design with the West Highlands it looks to be a very suitable name for 3403. The list of synonyms for the word should also give some clues, as does the word itself, with regard to what is considered to be expected of the locomotive when it is produced. The name is very much a part of the fund raising and attracting support is vital, you could argue that you don't have to name a locomotive, which is true at one level but if a name helps you to get your project built you would be foolish not to select those plates wisely. Now off to have quick look at Chaos Theory perhaps better known as the WSR.