... . I can only assume, that the prototype sizes of these chairs must be fairly fixed and defined, otherwise it could mean 'specials' have to be made which I very much doubt. As you can assume I am limited in knowledge on this particular point and would be glad of any help or suggestions, I do however, have a drawing of a single slide chair as used by the LNWR, but this somehow does not seem to fit the bill. Hope someone can help. All the best, Brian Nicholls. 1853_161453_200000000.gif posted: 16 May 2011 20:06 from: Martin Wynne Hi Brian, You have the slip switch much too close to the V-crossing. You can't have the other blade opening behind the check rail. Have you tried the slip switches provided in Templot for the purpose? Peg them on to the TCP and MCP peg positions. They are not based on any specific prototype, but will get you close to the required position for most. regards, Martin. posted: 16 May 2011 21:44 from ...