I'd like to be able to nominate arbitrary objects to auto-clip slabs, walls and roofs. Say for instance a beam. In the example I'm working on now I have an hybrid object made up using the steel 'Wide Flange' tool and simple extrudes for plasterboard fire protection. Some of these beams project down through the ceiling (slab tool). I'd like to be able to tell them to automatically clip the ceiling slab where the project through it, instead of having to manually clip the slab myself.