Anyone familiar with this or ever used one. I remember years ago when I was a gas jockey at an Exxon station the shop mechanics used one. But I forgot more then I can remember. It came to me for free. I'd like to get an idea what it does and how to use it. It is supposably in working condition but there are no instructions. It looks cool enough with lot of knobs to turn to keep my busy and entertained for awhile. If I can't figure out what is does or how to use it I'll just add it to the collection of shop novelties and look at it wondering the possibilities. Maybe I'll use it as a boat anchor.