For the sake of the sanity of everyone involved, just imagine the Liege like Battlestar Pegasus, or Galactica if you haven't seen Pegasus.(pegasus was just a newer version that was only in the series for around half a season.<br/><br/>And the Gre'vrens look like basically hollow missiles. So they punch through the plating and have numerous exits so the occupant doesn't get stuck if one gets blocked.