structural stress reduction on the fuselage undercarriage box sections
how does sweeping them forward reduce the stress on the box section? When landing, the loads have to pass through this section, regardless of relative wheel position to CofG (i.e. whether the undercarriage legs are swept forward or aft) Granted sweep either way would introduce more of a twisting moment to the structure..
C of G envelope advantages
what advantage? I can only see disadvantages from where they are positioned