... 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, but easily dealt with during construction with a few strokes of the file. These compromises are the price to be paid for not using P4. It's much worse in 00-BF or 00/H0 of course. You could try moving the slip switches a little closer to the V-crossings, but bear in mind that the points (switch tips) must be supported on a timber, must have room to open between the wing rail fronts, and the ...