[quote=The15thSpycrab]
According to the main post, the lizards are the pilots, engineers, and technicians, while the Grut are the grunts.
[/quote]

While the lizards are smart with tech, they aren't the leaders of the alliance. Which means both would have to work together on a ship design. Because the lizards can put it together, but only at the command of the Grut. The Grut giving specifications like size, purpose, weaponry, defensive systems, and probably shape.