Soldering Techniques?

[eightyeightfan1]

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 -->

Gotta agree.
I soldered all my connections when laying my flex track. The layout being in the attic, it never occured to me about expansion or the heat in the attic. One day, I went up to do some scenery work and found at least twenty feet of soldered flex track kinked, some parts actually lifted off the ballast.
Replacing the track, and any new line layed, doesen't get soldered.

As far as drop downs, Atlas sells drop downs, already attached to joiners, for maybe $2.00 USD each. I use these also. saves a lot of work.