@Engineer-Joe posted:if I understand the question (I don't have much LGB), no, the axles are fixed. The trucks do pivot. I have a ton of MTH one gauge and don't have any issues. My track gets out of wack almost every year and I have to maintain it when it gets very bad. Only issue that I remember was a switch that had dipped from severe ballast wash out. I had to jack that switch back up.
The one used MTH Hudson I had would pick another switch when nothing else did. It was on a corner. I sold off that engine for many reasons. My other steamers are fine.
Every time I see your videos, I so wish I had backyard space just to run a train outdoors. There's a bridge over the Santa Ana River in Riverside that would scale out to about 20 feet in O scale that would look awesome! 
