I had some time to stop at the club yesterday evening and shoot test lap footage of my scale-wheeled MTH Big Boy 4014 (oil-fired or "as restored"). As mentioned in my mini-review a while back, it will negotiate 36" radius (O-72) curves, but detests kinks and/or uneven track in curves (3:56) in the video is where I stopped it as it found uneven track behind the farm and again where it found a kink off the curved turnout (4:27). I actually had not really planned to run the locomotive at the club since we have other members with them already, but had planned on displaying it and running it on my home layout when I get it built (plus the occasional run on 2-rail layouts of people I know). It actually did better than I expected, but we need to clean up a couple of areas with errant trackage.