... by Richard's reference to how the crossing chairs sit on the diverging road. From my observation of the Rannoch turnout, I had always taken the base of these chairs to have been aligned so as to be square with the sleeper to which they were attached, and for the castings of such chairs to be designed accordingly. My observations have also suggested to me that the 'A' chair was usually (always?) carried on a sleeper spanning the main road. Can't wrap my addled brain around whether this has implications for the 'handing' of sets of crossing chairs according to the flexure of the turnout. posted: 28 Apr 2016 00:47 from: John Palmer Mike, thank you for posting those interesting additional shots. In 4mm scale Ian Terrell can supply etched representations of that point lever- see this link Interesting to note that at the time of your photograph Crianlarich's Up West Highland Line Home signal was still of Stevens LQ design. posted: 28 Apr 2016 00:57 from: Martin Wynne John Palmer wrote: 9. I don't understand ...