It is a beautiful model. I would prefer live steam, but the gasoline powered version probably better suits their operational needs.
They went to a lot of trouble to produce a pretty accurate looking Mason. One thing I noticed was that they opted not to have that continuously ringing bell coupling to the valve gear. I wonder how many of the prototype bogies were modified after delivery. That "ding" with every revolution of the drivers had to get old!
Thanks for the link, Ira!