Custom jig for assembling tracks
Build a simple jig to make aligning and assembling individual-link tracks easier. Start with a 12"-long block of 1" x 1" wood. Glue a strip of wood 10" x 1/2" x 1/8" (Part A) along one edge of the block. Then cut an identical strip (Part B), but rather than gluing it into position, secure it with two 1" strips of wood held in place with screws. This allows you to adjust B to the width of whatever track you are assembling.
CREDIT: FineScale Modeler reader forum, author unknown.