I recently bought a couple of the black side-dump ore cars (92503). Very nice, but I was wondering: Are the chains meant to dangle freely, or should they be attached to the chassis in some manner?

Greetings,

It’s been a while since I was active in model railroading, but I do have 3 Bachmann G scale engines and several pieces of rolling stock that has been in my attic for 6 years or so now. 

That said, my wife and I recently moved into a new home, and I am looking to do an indoor point-to-point layout.  I simply want my train to travel in one direction, pause for a bit, and then reverse in the other direction.  Basically, I want it to go back and forth.

Can someone advise me as to what electronic items I need and what is involved in setting-up such a layout?

Many thanks!