Hi folks, I've almost given up on this but... Is it possible to mount speakers on hollow walls? The walls are plaster in my room, and seem very weak, its annoying but I've heard its still possible to put mounts on? Good idea or not? And if so, does anyone know what I need to get? The speakers are about 7KG each (heavy I know). I've got them on these rubbish stands at the moment that take up too much room, and look awful.