I have added a layer of cork track underlay to one of my baseboards. This will be the terminus baseboard.

I brought a sheet of cork from the 7mm Narrow Gauge Association. Using the full size print out of the track plan I created a paper template and cut the cork sheet to shape. It was glued into place with lots of PVA glue, then weighted down with lots of heavy objects and left for a week to dry.

Next, tracklaying. Gulp!