He hiahainga kōriki ngā rau kahurangi, nō te mea kua whakaritea rātou ki ngā paerewa tūpato i mua i te whakamahi i a rātou hei whiti i ēnei pūngao e mahaki ana i ngā kahurangi. Kua hangaia ngā wānanga whiti i te whakatakoto i ngā pū kahurangi ki runga i te mete rānei, ko te harakeke rānei. Nō reira, ka hangaia ngā rau i te whakapai o ngā wānanga, ā, e āwhina ana i ngā mahi hanga ki te whiwhi mahi pai i roto i ō rātou mahi, kei reira hoki ngā rau kahurangi he rangatira. Hei tauira, e whiti ana ngā rau i te koneti, i te āpore, ā, āka mai anō i ngā kōrero whakatō i te toko. Ko te mana e pā ana ki ēnei rau kaha e whānui ana, e pai ana tēnei ki tō rātōu pūtake. E ai ki te tino take i whakapiki ai te mana o te whakamahi, ko te mea nei e kitea ana e te whakamahi, e āta whakaae ana ngā rau i te whakamutunga i te karanga rerekē i te wā e whakamahi ana i ngā wānanga mahaki. Ka taea e te rau kahurangi te tahuri i ngā whatunga kiko nui me te iti rawa atu ngā whakahoutanga. Me whakaaetia ngā rau nei i te iti rawa atu, ā, ina whakamahi ana i tētahi wāhanga kotahi.