Michael,

Thanks for your reply. I got a chance to check it myself in the meantime and noticed a restriction: In the case of the above example with extrusions, moving the source objects in the direction of the extrusion actually changes the extrusion height of the child object instead of moving it in that direction. I am assuming the reference plane of the original extrusion is considered another "source object" that would have to be moved along as well, which i'm guessing is not possible. Do you have a work-around for that as well? ;)

Michael H.