Arnold,
I'm always impressed with your layout, irrespective of the O-31 curves. You have an interesting track plan, multiple tracks and sidings, lots of switches, long straights, reverse loops, lots of accessories, a baseball stadium, many little people, and many types of rolling stock. Very creative - like your Forum posts. All in all, watching trains on your O-31 layout is more interesting than on either of my two loop-type layouts that are O-54 and O 72.
MELGAR