I didn't know I'd turn into a yellow tram geek, but I did, somewhere along the line(!). So - being asked to go to the depot and get some images for the Transport Authority meant it was beginning to feel a lot like Christmas.  Things I found out on my visit: 

1. The yellow trams are referred to as 'bananas' by the staff. Not too inventive, but I can get that...

2. They're 'stabled' at the depot.

3. The toolkits are red with yellow dots. Love that.