Burton-on-Trent South - Upper Level Tracklaying in Layout topics Posted October 23 19 minutes ago, ISW said: Mimic Panel for Single Slips When I built the Lower Levels, this included a pair of double-slips which, in tandem with other turnouts, provided 4 crossovers. Once I had got my head around the fact that you could think of a double-slip as a pair of turnouts installed toe-to-toe, this became easy to wire up as crossovers and produce the necessary mimic panel. You can see more details in posting: On the Upper Level Baseboards, the Leicester Line Junction includes both double and single slips. This lead me to wonder how to wire and mimic a single slip. Various fiddlings around with a 'crossover' formed of a pair of single slips wasn't getting me anywhere, and my head started to hurt. I eventually realised that a single slip can be represented as a pair of turnouts with the 'straight track' for each turnout forming the diamond. This is easily shown as below: With that little 'challenge' sorted I feel a bit more confident to tackle the wiring and mimic panel for the Leicester Line Junction. Ian Hi Ian, Doesn't the inconsistent representation of similar track formations with very different mimic diagrams worry you? (It's making my teeth itch just looking at it! ) Technically speaking, a train travelling through the double slip from west to east will encounter the facing red points before the trailing orange but the diagram shows something different... Using the idea you've come up with for the single slip on the double as well would be more correct and more consistent (but would admittedly place a lot of buttons and lights in close proximity).