... switch they support...", and yet the drawings seem to contradict that. That would mean in the example above that they are all "R" block chairs which is, I think, also consistent with your statement that they are always "square-on to the main road". It may be the case that there was a coque-up in the drawing office that the platelayers cheerfully ignored. Stranger things have happened. Regards, ab posted: 30 Jul 2017 00:01 from: Andrew Barrowman 2983_291849_380000000.jpg This is a sample crossing printed by Shapeways in sintered nylon. There are quite a few things wrong with it, but I rather like the material. The definition isn't quite as good as other types of material, acrylic polymer for example, but the trade-off is that this stuff takes a lot of abuse. posted: 30 Jul 2017 15:51 from: Martin Wynne Andrew Barrowman wrote: consistent with your statement that they are always "square-on to the main road" Hi Andy, No, ...