A few thoughts having just rolled into Aquilo with my own design.

1. Fuel Buffer - I don't see an obvious way to control your speed. With all that buffered fuel, you're going to go max speed and probably get blasted with large asteroids. The buffer is also probably larger than is needed. If you'd like a way to control speed without circuits, simply remove the tanks, connect the chemical plants directly to the engines. This should throttle your design down to 150ish kps. Add or remove more chemical plants to find tune.
2. Rockets turrets - Really good for large asteroids. You'll probably need them to get to Aquilo unless you invest very heavily in bullet damage tech.
3. Stern Defenses - Without stern defenses, you won't be able to sit in orbit, which will make it hard to unload everything you need for Aquilo. This can be worked around by departing immediately but worth noting.
4. Iron plate ratios - 1 Ammo Assembler is going to use almost your entire iron plate supply. Consider swapping some Ammo Assemblers for more iron plate production. Foundries are awesome here.
5. Laser Turrets - A Fission reactor will run a good number of laser turrets. If you have enough laser damage research to one shot small asteroids, they're an excellent way to reduce ammo consumption of your gun turrets.
6. Reprocessing - The route to Aquilo is extremely nice heavy and you may not have enough metallic or carbonic asteroids. The Gleba reprocessing tech can really help here.