Isolating a section of already-ballasted track?

[RobertInOntario]

Rob:
The gap has to be well stabilized. If the track is pre-fab, it may hold the curve. Flex track will need spiking.
I did one where I soldered a bit of PCB (an old tie) under the gap and only cut down to the copper.
Fill the gap with something solid -- not a blob of glue. Plastic strip or a toothpick and maybe down into a hole in the roadbed. Carve to the profile of the rail.
A Dremel will give you an angled cut unless you have an extension shaft. The Hobby shop should have some plastic devices that go over the rails to hold them in place while you cut.

David,

Yes, the track is pre-fab (set-track) so it will hold its shape. I like the idea of adding a toothpick or a plastic strip to fill the gap. The track is firmly in place, being curved set-track and already ballasted, so that shouldn't be a problem. Still trying to figure out if I need to buy a dremel or if I can do this with my Atlas saw. Thanks, Rob