I noticed something comparing your design with the official wiki specs. According to sources, the Infinity is almost 1 billion tons while your design is only 150 thousand. while I think the ship you build here is far too small to reflect the real Infinity, apparently even the frigates inside it are over a million tons which I do not believe matches with Aurora numbers. Tho I heard somewhere that the tons represented in game aren't metric tons or long tons but something else, perhaps it represents displacement.
I don't think it's actually possible to build something that large in Aurora that's still jump-capable. My second design is the largest possible ship that can still jump at the tech level I assigned for the UNSC.
Aurora tonnage is displacement of ton of hydrogen or something like that. 150kt is not as light as it sounds. If most of it is solid metal, you would probably look at millions to billions of tons.