... . That's because each different type of chair is stored as a block or a set of nested blocks. For example, if I want to alter the bolts on my chairs I edit the bolt block and every instance of the bolt in the turnout model immediately changes too. I'm probably over-simplifying a bit, but it's really not difficult. Cheers, Andy posted: 11 Nov 2018 23:50 from: Andrew Barrowman It was overcast today, so I took advantage of the diffuse light to get some better shots. 2983_111847_580000000.jpg I don't know who planed the rails for the vee, but they did a really poor job. Attachment: attach_2770_2734_DSCN4165.JPG 130 posted: 12 Nov 2018 00:04 from: Martin Wynne Andrew Barrowman wrote: The big snag is TurboCAD Pro is not cheap and I've had no luck finding a free CAD program that does the job. Hi Andy, If I make some progress with this, a paid-for CAD program won't be needed, nor CAD skills: 2_061704_070000000.png The DXF will come from Templot ready chaired. I ...