This is another one of those must have tools for laying track, whether it is set or Flexible track makes the job so easy to get those tracks parallel. Uses the same stirrups as with the curve former Once locked in place they can be just slide along the tracks. I have 4 of these. The scales are engraved on the bottom of the perspex, in inches and metric. The DXF and the Inkscape SVG file will have to be downloaded from Thingiverse as Pinshape won't allow these files, if you have a laser to cut the plate out of perspex or something else or you can use the STL to print one out. The lines in the SVG file are very fine only 0.01mm so may not be visible, this is a good size for the laser engraver