Martin,
Cut gaps in the rail so it can slide rather than move in and out of gauge.
Others,
I have had some track down for 6 or 7 or more years and have never had a brad raise its head. The Homasote holds well, at least, for me. Also, I put carpenter's glue between the plastic ties on curves to hold the geometry of the ties. If it is hidden track, I use a lot of glue. If it is meant to be ballasted later, I use just enough to fix the position of the plastic ties and still leave room for ballast on top. One more step that I left out in my first reply. I plane the Homasote to 7/16" thickness to avoid the problem of the varying thickness of the Homasote.
tt,
Thanks for the compliment.
Ed
