prefer ME flex track for visible locations because of its superior
appearance.
Marking center lines
The MidWest Products cork roadbed I use needs to be split in
two along a pre-cut diagonal. Then, the two pieces are glued
in place back-to-back with their beveled edges (more or less)
simulating a ballast profile.
If care is taken to closely align the cork roadbed when gluing it,
the seam between the two pieces can be used to guide track
placement. But I always lightly sand the cork to smooth the top
surface and this makes it hard to see the center seam.
MRH-Sep 2014