... at both ends of the curve. I *think* I need a slew, and I've tried to do it, but the results are rubbish. I've closed a screen shot of the area (the control template and the marker coloured template are the two I wish to join), and a copy of the relevant bits from the box file, if anyone cares to lend me a hand... Thanks in advance. PS: I'll need to do the same for the next set of rails out... 499_191106_520000000.png Attachment: attach_2885_3491_slew.box 114 posted: 19 Aug 2019 17:45 from: Martin Wynne Hi Richard, The problem with the transition isn't that the radii are too similar, the problem is that they are both on the same centres. Is this any good? You didn't say how far round the curve you wanted to go on the right, so this is just my guess: 2_191229_460000000.png 2_191229_470000001.png Box file below. Manually create a transition having the required radii change over a suitable length. Add a slew that starts and ends ...