Mismatch
The prior ref. to weight involved a hypothetical increase for additional system design in the Trent. Specifically a bypass for Fuel around the FOHE. The Trent is already leaner by 2,600 lbs than its GE counterpart, so some room may exist for a contemplated addition of Plumbing. Of course weight is important. Safety frequently revolves around weight. Where it is, and how much there is.
AF