This is a question not a tutorial. I am using Kato unitrack and ever single locomotive I have runs very smoothly over ever inch of track........except for the switcher I recently purchased. It is the only working locomotive I have from Bachmann so it may be a manufacturing issue but what is it about switchers and switches that don't ever seem to go together. (I have had other switchers in the past and they didn't like switches either.) I couldn't find an Atlas S2 in SP so I took a chance on the Bachmann S4 as I thought it looked very good. It runs beautifully at very slow speeds. It is a reasonable puller as well. But as soon as it sniffs a switch it stalls. The only way to keep it from stalling is running it at unprototypical speeds, which ruins the entire illusion. Is this common with switchers? Is there a fix for this or should I just go back to using an RSD5 to do the switching chores?