... , etc. This rule produces the classic alternating wide and narrow spacings of track in pairs, as seen for example on the cover of David Smith's GWR track book: cvr_track_400px.jpg In addition to that, track spacing has to be increased on sharp curves to allow running clearance for vehicle overhang. See the tools> dummy vehicle menu item for the tools in Templot to check and adjust clearances. regards, Martin. posted: 5 Oct 2017 12:53 from: Tony W Hi Richie Screen shot with check rail ends bent. 2151_050739_350000000.png Screen shot with check rail ends machined. 2151_050741_050000000.png The later would be more appropriate to your era. Regarding the track spacings of quadruple tracks, there are two main ways of doing this. The WCML was generally arranged as Up Down fast, Up Down slow and would be spaced at 11'2" 15' 2" 11' 2" centres. The alternate way as exemplified by the ECML used Up slow Up fast Down fast Down slow spaced at 15'2" 11'2" 15'2" centres. These can be set under GEOMETRY ...