... should be easy, according to the drawing above that should be 4,5 inches. Now, I have to input more timber data, since the timbers have varying cc I made a small picture to keep track of them: 2094_221338_310000000.png Tie 1 to 2 spacing, 22 inches. Then 20 inch cc up to tie 7. Then 20,5 inches between 7 and 8. 8 to 9, 21 inches. 9 to 11, 20 inches on both. Then 20,5 inches up to tie no 28. 2094_221345_540000000.png At tie 28 the spacing changes to 20,75 inches and continues like that to tie 36. Then it gets tighter and 19,5 inches up to tie 45. However, after pressing ok on tie 41 I just get back to the following dialog: 2094_221349_370000000.png 2094_221352_320000000.png What to do? I dont know how to continue and the turnout looks a bit unhappy at the moment. Might be worth noting that Im using the TDV version. Question is if this is a bug or if I did something wrong.. ...