I have a renovation project that requires the modifying the roof to create more headroom for the attic space used for bedrooms. The existing roof has a 9 1/2:12 pitch. The new roof will have about 6" width of both side with 9 1/2:12 while the new roof will have 3 1/2:12. See attached pictures. Pic2 is what I want to design. The original was a gable.