... . Well that has always been my understanding, and all the switch drawings I have show this. Including the Exactoscale templates. Unfortunately it cannot be. There is only one pair of L and R block chairs in each size, which are used for both left-hand and right-hand switches. The chair drawings clearly show the outer jaw for the stock rail square to the rail, with the inner jaw angled to match the switch rail (blade): 2_210026_220000000.png I have therefore now modified the code for this: 2_210052_560000000.png Unless and until anyone can shed more light on this? regards, Martin. posted: 21 Jan 2016 18:20 from: Andrew Barrowman Hi Martin, Can you point me at a list of the various chair types? The information I have is all from the 1930's. Regards, Andy posted: 21 Jan 2016 18:41 from: Martin Wynne Andrew Barrowman wrote: Can you point me at a list of the various chair types? The information I have is all from the 1930's. Hi Andy, See ...