I took my camcorder with me on this train ride when I was in Maui last year. I took a total of 35 minutes of video and cut about 26 minutes out. I apologize in advance for the jumpy camera 
http://www.youtube.com/watch?v=EI-F5JzVWi0
BTW, Mertyle would make a great Ruby modification project.
Thanks for sharing, Richard.
Neat loco.
Ralph