Soldering Techniques?

[poliss]

The problem with soldering at the rail joints is that it leaves no room for track expansion with variations in room temperature which can, in extreme cases, lead to track buckling.
Here's a video showing you how to solder droppers for track feeds. <!-- m --><a class="postlink" href="http://www.youtube.com/watch?v=b1YkdrYlGbM">http://www.youtube.com/watch?v=b1YkdrYlGbM</a><!-- m -->