Got in a few 1839 playtest games this weekend (see picture). The new train roster model (12 ranks, 10 rusting events) is working well (better than expected).
Made the first map change in a very long time (2 years?) -- added a track stub to an OO hex to increase variability. Also tweaked train pricing slightly and am now deep-diving on exact counts. I suspect it is a little too thin -- totally playable -- maybe a bit more austere than ideal.