I'll be honest here, before you tested this I actually redid the interior using a framework of girders housing 8 liquid fuel tanks inside, I'll provide a picture soon Also as a sidenote, even wrecked in the first demonstration the ship could still function autonomously using the rear probecore or the core on the right section Edit: Here we go! some things worth noting is that the fuel tanks are attached to a central girder which are linked to the engines by fuel lines, the frame itself is attached to a central girder right below the command pod with 4 girders branching out to make up the framework and that the design is otherwise unchanged though the ship is a little wider now old craft file link still works but here's a new one