Thanks for the inputs. Yes, i was lining up to do that, a "fake slab". The advantage in Revit is the sketch mode. You can, in a second, copy paste shape (between pads), so sides of pads are perfectly aligned. And the selection tool (pick tool) is far more useful in selecting a particular line than the magic wand... This kind of round building isn't so simple on Archicad, mainly due to the absence of sketch mode for creating slabs/ beams etc. Anyway, dwg's have been released last night and we will figure out a way to fix these small issues. The best will be to create a layer with only 2d shapes (representing the structure etc) and when creating a new element, hide all layers but the 2d shape layer and use magic wand. And offset of an inch to avoid topo to pass through, as you suggested. Long way around 🙂
Archicad 25 - 5010
Macbook pro 13" /Big sur 11.4 + External 4K 27"