Isolating track after ballasting?

[nachoman]

The atlas saw may produce a gap that is a little too thin for a plastic bag clip. Using a dremel-type tool isn't that great either, because the cut may be wider than it needs to be, and it's hard to cut perpendicular to the rail because the motor part of the tool gets in the way. If you use a flexible shaft in the motor tool and a thin cut off wheel, you will have better results. I tend to favor using a razor saw, being extra careful not to damage the track, and then cement in a very thin piece of styrene using CA. Even a thick piece of paper may work. If you don't put in something to fill the gap, you may wind up with electrical problems down the road because expansion/contraction can close the gap.