... was taken ill at a show? He has also sent me several very helpful e-mails recently. posted: 27 Nov 2015 22:22 from: Martin Wynne Jubilee42 wrote: The problem is here: 3033_271615_020000000.jpg Hi Richard, Here's some stuff which I have posted before. It looks that your knuckle bend is a bit too sharp (red line below): The knuckles should be radiused, the knuckle gap being wider than the crossing flangeway gap. Here's a diagram which may help when setting the wing rail knuckles: 2_220535_490000000.png The blue infill shows the theoretical ideal with a sharp bend at K exactly matching the angle of the vee and in line with it. In practice on the prototype it is not possible to make such a sharp bend because of the 1:20 inclination of the rails. Instead, a short curve is used, as shown by the green line, making the knuckle gap wider than the flangeway gap. It works fine, and can help if replicated on the model. Some companies made this curve quite gentle and obvious ...