The right arm (from the ship's POV):

The first two elements have a white center which has to be cut out. However, if you do this the parts will become extremely fragile because the rim at the longer ends of the oval is very thin. Thus I chose to leave a thicker rim first...

... goued the part together and THEN cut out the rest of the center piece.

Another run:





The first two elements have a white center which has to be cut out. However, if you do this the parts will become extremely fragile because the rim at the longer ends of the oval is very thin. Thus I chose to leave a thicker rim first...

... goued the part together and THEN cut out the rest of the center piece.

Another run:



