Glue the Aluminum barrel to the steel rod so that the rod extends half way into the barrel. The barrel should be tight to the top of the top base and the rest of the steel rod extends through the top base. Glue three 1 disk magnets to the top of the top base piece positioned so they fit within the sides of the corners and do not go over the edge. They should be around the center barrel, cups down. North poles up.
Poles are in attraction.
Take a large coffee can and remove the top and bottom so you have a cylinder. Take another coffee can and cut off a 3 high piece with the top removed. Glue and tape together with epoxy and electrical tape. Shell should now be 9.5 tall and 6 diameter. Inside ridges need to be flattened at 120 degrees apart to allow the frame to slide in snug.