Hi,
this is a video tutorial how to overhaul your digital clock with the available repair kit:
http://www.youtube.com/watch?v=4j5Bg05vLuE
As usual, the video has a German soundtrack but English subtitles are added to YouTube. If you don't see them by default, watch the video directly at YouTube and press the subtitles button below the frame.
Enjoy it,
Jürgen