Printed on a MakerBot Replicator 2. This frame comes in 2 halves with 4 landing pegs. Run CA glue down the edge of each half of the frame. Mash them together until there are no gaps in the teeth. Make sure to lay flat on some wax paper or aluminum foil and either let dry by itself or hit it with some accelerator. After the halves have bonded glue each of the landing pegs in place.