... gauge. The B switch is a semi-curved switch in bullhead, again not something to be found on narrow gauge. Ideally you need to create a custom switch from prototype data, but for most narrow gauge and industrial practice you can simply use an existing short straight switch. Here I used the 1:24 short model switch in Templot to get close to the Peco sizes. Then I adjusted the crossing entry straight to match the Peco lead length. This is the result overlaid on the Peco H0m drawing: 2_141329_320000001.png 2_141329_320000000.png base drawing© Peco The Peco check rails are ludicrously short, and the vee rails look unlikely short to me. So as you can see I have extended them beyond the Peco drawing. The radius comes out at 525mm. I set the rail-head width to 2" (guess) for narrow gauge, and 6ft long 9" wide timbering at 30" centres. .box file attached below. However I really don't suggest you build this. A 1:6 crossing angle would be much more likely and maybe ...