I've been wondering about occasions like this that appear to need support material, could the reprap software be told that two pieces of thin wood will be placed on the work area, with a gap for the handle? This would work for all simple single-layered overhangs. You could also turn the cutter "complex side down", then print a handle on its back. Not sure if the software will print "floating" objects, but you could always trigger the z-min sensor at the appropriate height. Really like the idea though for the cutters, would a soft plastic make usable ink stamps?