... not sure. It should be right in the centre of the plan. Hi Dave, Not only irregular, but on a transition curve. Here you go. Crossing angles left to right are: 1:9.69 V-crossing 1:7.52 K-crossings 1:6.59 V-crossing So the 1:7.52 should be ok for fixed K-crossings. 1. normal view (sorry I can't attach it, the file formats won't match): dave_irreg_diamond.png 2. as a bgs file loaded into version 091c: dave_irreg_diamond_as_bgs.png BGS file attached. If you load (or add) it into your background shapes, you should be able to remove the overlaid templates and everything should match up. (I changed the 9ft timbering in your file to 8ft-6in.) regards, Martin. Attachment: attach_498_744_nechells_09_02_28_2 130_28.bgs 325 posted: 28 Feb 2009 22:11 from: davelong Thats really great thanks Martin. Strange really, I'd sworn I'd checked when starting what timber size was selected, but then I always did have a strange feeling something wasn't ...