... Hope that's clear. Ask again if not. Here's the box file. cheers, Martin. Attachment: attach_2886_3491_richard_slew.box 121 posted: 19 Aug 2019 19:09 from: richard_t Brilliant Martin- that worked a treat. posted: 19 Aug 2019 20:20 from: Martin Wynne richard_t wrote: Brilliant Martin- that worked a treat. Hi Richard, Glad it worked. p.s. A more conventional solution without using a slew, would be to use only the 2 transitions, replacing the lower one with a new one: 2_191518_570000000.png 2_191509_170000000.png The transition on the right reduces from 1800mm to 1750mm in a zone length of 700mm. However, that wasn't what you asked for, and it modifies the concentric alignments at the bottom perhaps more than you wanted. Decisions, decisions... cheers, Martin. posted: 21 Aug 2019 10:47 from: richard_t Thanks Martin- I quite like the slewed one, so I might stick with that. The curves join up a plan of Manchester Central pretty much to scale (until the curves that is ...