Isolating track

Mike,

Between the main lines I have some switches that connect directly to each other and others that have a 10" straight section between the switches.  I need to know where is the best place to isolate one main line from each other at or within the switches. 

Actually, anywhere convenient in the center rail between each pair of switch tracks.

I would also recommend isolating any siding you will be storing engines, cabooses, or passenger cars on.  This way you can leave the power off while storing these items and not have the lights be on, etc.

At the very least isolate one siding to use as a programming track.

-Greg

How would isolating the center rail between the switches impact wiring Ross switches for non-derail ?  

Also, with DCS, does it matter which outside rail is used for the common buss connection, and does using either one impact non-derail wiring or anything else ? 

Should the same inside or outside rail be used for the common connection throughout the layout and does it matter if it isn't ? 

Mike