... . regards, Martin. posted: 8 Feb 2009 21:35 from: Paul Boyd A variation on a theme is attached Both lines through the diamond are curved in opposite directions, and the slip road is also on a curve. I have no idea what this formation would be called! Suggestions on a postcard please... Thanks go to Alan McMillan for making me do this irregular diamond properly Mr L- hit the 'End' key to lose all the name labels- I never bother with them myself Attachment: attach_486_465_Throat.box 490 posted: 9 Feb 2009 08:10 from: Raymond That is very impressive and must have taken a while to get right. But, ought there not to be a 14" timber under the centre of the diamond? Regards Raymond posted: 9 Feb 2009 10:06 from: Paul Boyd Hi Raymond But, ought there not to be a 14" timber under the centre of the diamond? Ah- yes, you're right. Thank you!! posted: 9 Feb 2009 10:35 from: ...