... edit them using global find& replace in any text editor, such as Notepad++ (free from: http://notepad-plus-plus.org/). Or you could write a small Windows utility to do global replacements (such as adding a shift to all Z co-ordinates, or changing all the scaling settings, or whatever). Here are the 2D DXFs in TurboCAD: 2_012339_590000000.png And in LibreCAD (free, open source, uses DXF as its native files, http://librecad.org/ ): 2_012341_050000000.png cheers, Martin. posted: 2 Aug 2018 05:03 from: Andrew Barrowman Martin Wynne wrote: Yes, I did mention that. At present I have left and right hand versions of each chair. The versions are mirrored on Y. You have replaced all the right-hand chairs with left-hand chairs, or vice versa. However, for the keys I have done things differently, so I may abolish the handing of the chairs. Hi Martin, I would encourage you to do that. Anyone ...