For the past couple of projects I've been using Liquid Nails for projects to attach the track to the cork roadbed. The advantage of using this as opposed to the white glue I had used before is that it won't come loose when the track is wet while applying ballast. This is mostly only a problem on curved track.
Ballasting the tracks where I explained the techniques I used on the Musashi-Koyama modules so I won't go through it all again here.
I am still doing ballast the same way but on this module I am using Arizona Rock & Mineral No. 130-2 Northern Pacific Medium Gray Granite which to my eye looks better with the concrete ties. I also plan to experiment with some weathering of the track that may enhance the appearance.