... extra rails are attached to the switch rails at their fixed end and to the stock rails near to the toes of the switches, so transferring stress from one to the other and limiting the length of switch that can expand and contract as the temperature changes. Thermal movement being one of the more common causes of trouble with switch diamonds, and is why they are the most likely track item to get painted white. Image borrowed from cab video as I never seem to have gotten round to taking a photo myself. Attachment: attach_2485_3061_SSD.jpg 214 Last edited on 7 Sep 2017 20:53 by DM Parts of Templot Club may not function unless you enable JavaScript (also called Active Scripting) in your browser. Templot Club> Forums> Prototype pics> Irregular switch-diamond about Templot Club Templot Companion- User Guide- A-Z Index Templot Explained for beginners Please click: important information for new members and first-time visitors. indexing link for search engines back to top of page Please read this important note about copyright: Unless stated otherwise, all ...