... topic: 1711 Sketchboard v Box File posted: 1 Dec 2011 20:13 from: Gordon S Hi Martin, apologies if this has been picked up or I have missed something. I'm working on ET and suddenly noticed there appears to be a discrepancy between the box file file diagram and sketchboard. Here's the box file. 479_011506_030000000.jpg The track on the plan starts about 1'6" from the botton edge and just over 2' from the top edge which is 18' away from zero. Here's the sketchboard plan that is confusing me. 479_011507_450000000.jpg Now this is where I'm confused as I don't understand the relationship between the numbers and grid lines. There appear to be metric numbers in the yellow band, but they don't start from zero. The blue numbers on the left edge could be imperial measurements, but don't tie up with the blue grid lines. The grid itself is accurate as the position of the outer tracks will confirm. Am I missing something or do I have to change the number indicators to tie up with the grid? I've searched ...