... equivalent to an A switch), so this is not recommended for running lines, or if the slip is on a curve. Shortening the check rails means entering modified dimensions at| real> K-crossing options> K-crossing check rails...| menu item. The help buttons explain each dimension. Here are some suggested dimensions for a 1:7 single slip in 00-SF using 1:24 slip switches. The dimensions showing in blue are the ones which have been modified from the defaults: k_check_mods_ds.png k_check_mods_ms.png Note that for a single slip it is necessary to modify only one of the check rails. That means reducing the diagonal-side (DS) half-check rail on one half-diamond, and the main-side (MS) half-check rail on the other. For the example shown I reduced each end by 39", and to help maintain checking I reduced the flare length to only 27". Here is the result: slip_mods.png You can see that there is still a slight conflict, ...