The armory is very large for a crew that size, so unless you have room for an army, you shouldn't have ammo for an army (warship regardless). I didn't check to see if you had a transporter room, and that's always a good thing to have. Also, the alarm should trigger a noteblock, although the piston thing was cool. Overall, you just need to maximize space, and reorganize the layout a bit to have the most rooms with a purpose as possible. (Also, for weapons systems, (if you are into them, I'm not so much) you could try lava beams activated by pistons (actually I don't recommend that, it's not my style).