Chevrons, locked! We couldn't find any printable Stargates with active event horizons, so we made one.
This stylized Stargate model is designed for dual extrusion printers, and test printed on our own Bukobot printers in-house. In our prints, we used a glow-in-the-dark blue PLA for the event horizon.
These were used for demo print included in a Protocrate (http://www.protocrate.com/) subscription box for 3D printing.