@Bobby Ogage posted:I fear that the body overhang on 031 and 042 curves may be significant, and too much for my railroad.
I think I can help you with that question. Here's what my personal 72ft McKeen build (same length and format as the Ann Arbor kit) looks like on an O31 corner on my layout. The pilot does have about a 1 1/2" overhang from the outer rail.
For comparison, here's a Premier Scale MTH 18" coach on that very same corner. The overhang is about the same. I think these coaches are rated for O42. Hope that helps you!