Yes I checked the wheel gage on the derailed loco's and cars. They were within limits. I used the track gage that came with my rail bender. The switch ties shrunk by as much as 3 mm on my hand made switches hence my effort to find out what happened. My new coffee table in our Pinetop house also shrunk during the same period. I'm guessing that the cause is our super dry climate here in AZ. I can't change that so I'm looking into new materials for my hand made switches.