I second Bill's thoughts on the vacuum brakes.
After observing Jason using them on the first trip up to Alna Center for the Christmas trains, on subsequent trips I was fairly easily able to stop smoothly at the stations. I think thats pretty amazing for a first use and I congratulate the entire crew that's working on the brake system.
From the engineering design, the implementation and extensive testing, and the patience to get it right, it's a really remarkable effort.