Like Ed said, the one I had you would mount a metal template above and a magnetized rotor would follow it. There were one or two threaded rods that would require a hole in the template. What kind of pantograph do you have? Picture would help.
/ How to hold a Template when using a Pantagraph (duplicator)
The 3M contact glue, hot glue gun and automotive grade double sided tape work pretty good. I tried velcro with little success. Have been busy in the business lately, however, I will get a pic of the project posted shortly.. Ken Sweet