... 1/2 a rail width, but no further. Stangely, if the heel is offset by a whole rail with or so the radius is 109", but moving it over 1/2 a rail the radius becomes 57"! Obviously I'm missing something- any ideas? Latest file is attached. Cheers Richard Attachment: attach_166_261_mylayout18.box 341 posted: 26 Nov 2007 04:23 from: Martin Wynne BeamEnds wrote: Obviously I'm missing something- any ideas? Hi Richard, I think what you're missing might be this: odd_radius.png Templot limits the radius to double the track gauge (64mm) as self-preservation in the maths. Unfortunately that includes parts of the alignment which are beyond the boundaries of the visible template. I will have a look at a solution and report back. regards, Martin. posted: 16 Mar 2008 18:06 from: BeamEnds Hi All, Soddingham-under-Piddle is is now on the verge of leaving the virtual world to enter the "real" world. Following some gentle nudging from Martin I've converted ...