I have an EZ Track switch that a couple of days ago started shorting out my system when an engine runs over it. It's OK in the turning position, but shorts out in the straight position.  I need some ideas as to what is causing this. Nothing has changed on the layout.

I have three Bachmann heavyweight cars that make a screeching noise when rolling.  It sounds like the wheels need lubricated, but I have done that and the noise continues.  Any suggestions?

I am looking for 8 feet of Code 100 N/S rail.  I can't find any except to purchase large amounts which i don't need.  Can anyone assist me?
Roy