... ) I'll look forward to seeing the dual gauge tutorial- it should be interesting to see how it should be done rather than muddling through until something fits Thanks again Steve posted: 18 Feb 2014 18:41 from: Martin Wynne Hi Steve, Sorry to raise another problem with your design. There is no checking at A to prevent narrow-gauge wheels travelling from right to left from hitting the nose of the vee at B. As this vee is on the outside of a curve, a check rail is essential: 2_181336_310000000.png And travelling in the trailing direction they will bump against the check rail knuckle. If you want this turnout to use a common switch, the only solution is to change the size of the underlying turnout. regards, Martin. posted: 19 Feb 2014 00:16 from: Steve Bedding Hi Martin, Thanks for your eagle-eyes......there's no such thing as a problem- just another challenge to overcome... I can see exactly what you mean; this could/will have disastrous implications ...