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Also don't forget the part `rotate' button. This will often put the pieces into a new orientation which makes it easier to turn the XY co-ordinates mentally into something useful that you can visualise. By 'rotating' the triangles drawing and watching the XY coordinate of each triangle point , its easy to get the dimensions. Usually one point is closer than the other two, so just rotate the triangle until the Y coordinate of the upper point is half the X co-ordinate,the triangle is then horizontally symmetrical , and the XY co-ordinates give all triangle dimensions directly.
If you look at the triangle support bar part diagram , it always gives you or `radius of C of G ' figure which is the radius of the circle the three collimation bolts are on. A simple scale drawing can then show the correct seperation of the cell frame bars etc. Evertything els then falls in to place. Hope this helps.
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