Talk with ada people in ai13
Frontal shock on undercarriage due to catapult ops has been studied in computational models, NAMCA undercarriage will be strengthened but not to the extent of LCA.
Shock dispersion was difficult in LCA due to small size. Therefore the undercarriage had to be strengthened considerably, led to weight increase.
AMCA structure is different and the LCA experience has helped.
Also NLCA landing gear is over engineered, so can be lightened. To accelerate the process Boeing help taken.