... -0in is pushing it a bit, and would mean an F-18 or F-20 turnout in 0-MF. Which is the longest normally found on the prototype for bullhead. Making a 1:20 vee from rail is no 5-minute task. If you could ease the outer radius to 1870mm (6ft-1.6in), and set a generic (or curviform) V-crossing, you could do it at E-16 which is bit easier to build, and saves some space: 2_020933_490000000.png 2_020942_470000000.png Martin. posted: 2 Jun 2017 16:16 from: Jim Guthrie madscientist wrote: Now my space contraints mean my main line double track inner curve is at 6'( sorry I'm an old money man!) And I need to diverge inside that to access the goods line, that divergence radius, I'd like to keep to a min of 5'6" I haven't temploted this yet. But even in O-MF am I storing up issues here Dave, I did almost exactly that formation for the trailing cross ...