LCD Projection Pad Experience

["Kevin G. Joback" <Kevin%fungus.mit.edu@RELAY.CS.NET>]

  (I apologize if this came through twice.)

I am interested in using an LCD projection pad which hooks up to the Mac
II to project work done on MacIvory.  These pads display the screen
images of the Mac on an LCD display which is used with a conventional
overhead projector.  Has anyone tried these?

    1) Which projection pads work?
    2) What kind of quality does one get from these?

Thanks.