>Unloaded/Undamped. Does this correspond to "not attached to the tub? More like tub empty of liquid. All ultrasonic cleaner instructions I have seen say that it should never be operated without liquid in the tub. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body