All of my stock MTH engines run well on my layout. This was my only one that had tracking issues. I have several different steam engines and they all run very well, in and out of sidings too. Challenger, Allegheny, Pacific, Atlantic, etc. The Pacific runs so well that got me to look deeper into MTH steam.
The funny thing to me here, is that one of my Sunset 3rd rail engines gave me issues with it's side rod. My Niagara would bind and struggle until I worked on it. I learned later that it may have been out of quarter. The side rods were too tight though I thought.
Under PS2, MTH smoke, and with a Peerless speaker, she is one of my favorites to operate. She got a new polarity switch today.
Edit: New video with the smoke right.