... standard, and there's no way I would attempt it even in P4 with its smaller crossing gaps. I did actually create a box file for this with turnouts instead of plain track, but I reckon it'll be unbuildable so haven't posted it. Actually, another issue is which "OO Finescale" standard you're using? Templot seems to have several... Perhaps if you could give a bit more background into exactly what it is you're trying to do we might be able to offer some more constructive help. Cheers Attachment: attach_672_961_3_radii.png 409 posted: 25 Oct 2009 21:42 from: Josh C Paul Boyd wrote: Hi Josh There's a couple of issues here. The first is that prototype track doesn't have a radius as such- a turnout will be expressed in terms of the crossing angle and switch type. Not withstanding that, I've attached an image showing the three radii you're after overlaid on top of each other. The second issue- you can see that the crossings between the 42"& 36" (approx 1:14), ...