... : 2_160524_310000000.png However, looking at TurboCAD DeLuxe 20, that option appears not to be available in the file setup. Instead, it seems that it loads the DXF file in inches regardless, and it is then necessary to change to Metric units at Options> Space Units menu item after opening the file. Although I said I would do no more on the chairing, I have in fact been doing so, and I now have an algorithm to set 1 or 2 bridge chairs as necessary at the heel of a switch: 2_160542_230000000.png When only one bridge chair is needed, I can't find any consistency in the REA sources as to which rails get the bridge chair. Different drawings show different arrangements. Anyone? For Templot purposes I have for the present decided that the bridge chair goes under the turnout-road rails. A possible argument against this is that a skewed bridge chair has the chair screws closer to the edge of the timber than a skewed ordinary chair would have. This may become more of an issue in chairing crossings on square-on ...