Build a LOR in under 5 mins.

Warning - the video is rather boring if you're not thinking about getting a LOR unit.

If you can work really fast, then it's possible to build and test a LOR unit from kit form in under 5 minutes.
Here's a video showing you how:
http://www.youtube.com/watch?v=xEXr3d0mIZg
(OK fast forward did help a little!)