In this video from oorail.com we show you how to add an LED to a LIMA / Hornby InterCity 125 HST. Since the LIMA InterCity 125 HST does not have a light deflector it is being used with a high intensity LED for track testing. The video explains why time tested methods of track testing with Tri-Ang and Hornby Railways Dock Shunters no longer work very well on modern tracks and points. The video demonstrates how to use an old HST with a high intensity LED to spot weak areas on your layout.