Ina eke ki waho o te rori, he mea tino nui ngā wīra whakarewa koranu. Nā te whakarewa matatau me ngā taputapu CNC, ka tino kiato te koranu, karekau he hapa, ka whakanuia te kaha kume me te kaha tuku hei tu atu i ngā kaha nui o waho o te rori pēnei i te piki pari, te whiti rānei i ngā awaawa.
Mā te ōwehenga kaha-kiato kua arotauhia o te koranu ka whakaiti i te taumaha me te kore e ngoikore, ka pai ake te whakawhiti mana i ngā koraha, i ngā repo rānei. Ka āraihia e te paninga motuhake te waikura i ngā whenua uaua.
Ko te hoahoa, he matotoru, he kanorau ngā tītaha e whakanui ana i te pakari me te āhua pakari. He pai te awhi mō ngā potae whānui, e whakapiki ana i te mau ki ngā mata uaua, ā, e tiaki ana i ngā kakau takirere. He hototahi ki ngā tauira o waho o te rori o te ao mai i te 17 ki te 20 inihi, he maeneene te tāutanga me te hiri me te whakamau tika, e whakarite ana i te maia i runga i ia haerenga o waho o te rori, kua rite ki te aro atu ki ngā wero o te taiao.