ʻOi aku ma mua o 16 mau makahiki o ka hana ʻana i ka puna lau, nā huahana i hoʻopau ʻia e ka Stiffness Testing Machine, Arc Height Sorting Machine a me ka Fatigue Testing Machine;ʻO nā mea waiwai mai nā wili kila kiʻekiʻe 3, ua hanaʻia nā huahana a pau i ke kūlana kiʻekiʻe o ka pā pālahalaha, e hōʻoia i ka maikaʻi mai ke kumu a hiki i ka hopena.