... was wandering on what basis the min radius warnings were set? Hi Russ, Straight off the top of my head when I was writing the code 10 years ago. What you are supposed to be doing is setting your own required minimum radius, to suit the type of layout or the location for each template. So when adjusting a template in the goods yard for example you would likely set a lower minimum than for say a main-line junction. Click the change... button to set a new limit: change_warning.png This setting is specific to each template, so you should be aware of this when copying a template from one part of a layout to another. Whenever you get the flashing red warning, always check that the current minimum is actually appropriate for the conditions. Bit it is only a warning for the user -- it has no effect on the actual design. Is it permissible to go below the min. radius advocated with industrial type 4 wheel short wheelbase locos and stock or would that still result in poor roadholding/ ...