You can model one of the top hatches in the open position. You will need two of the alternate Rhino top plates. On one plate, remove one door with an hobby knife. Take care not to damage or remove the rounded hinges. On the second top plate, cut out the same door, but carefully remove the rounded hinges. On the second matching door, cut out two divots to receive the hinges from the top plate. Then, cover the door with a very thin piece of plasticard and add a handle bar. Lastly, use the same thin plasticard and glue on two small rectangles to complete the hinges. Once the glue has dried, use the smallest pin vise bit to put two holes in each hinge plate.

Because you can flip the Rhino's top plates, the hatch door you have created will have the texture of a exhaust vent on its reverse side. The thin plasticard has hidden much of this texture, but you will have to deal with the edge of the hatch in order to make it appear as if it is solid metal. With green stuff putty, fill any triangular gaps that are facing outward. Once the putty has set, carefully use a sharp hobby knife to trim down any rough edges. If you’re still not satisfied, polish off your putty work with a fine file. Your putty work will look something like the image above before you trim it down.