I roto i te ao hanga, he maha ngā painga motuhake o ngā hua a Arex. I roto i te pūnaha hononga paipa, ka taea e tā mātou tīma hangarau te whakapai ake i ngā rauemi paipa kia rite ki te āhua o ngā kiritaki, me te aro ki ngā momo pāpāho tohanga, hei tauira, mō ngā hua hononga whānui whakarewa, ka taea e mātou te tāpiri i te ngongo rapa, te ngongo kirihou rānei ki te pakitara o roto kia rite ki te reo tohanga, kia kore ai e waikura tika ngā wāhanga whakarewa i te wai. Ka whakamahia e Arex ngā hua rauemi whakarewa me ngā rauemi kore-whakarewa kua whakakotahihia kia whakamahia katoatia ai ngā āhuatanga o ngā rauemi rerekē, kia puta ai he hua whakakotahi me ngā āhuatanga maha. I roto i te tukanga hanga katoa, ahakoa ko te kawe me te tukatuka i te onepu me te kōhatu i te wā tōmua, ko te tāpiritanga rānei o te pūnaha paipa i te wā waenga me te wā mutunga, ka kitea ngā hua he āhuatanga whakakotahi o ngā rauemi whakarewa me te rapa-kirihou i ngā wāhi katoa. I te whanaketanga me te hohonutanga o te umanga hanga, e whakapono ana mātou ka taea e ngā hua a Arex te whakarato ki ngā kiritaki he tāpiritanga nui ki te mahi a te umanga. Ka taea hoki e ngā kiritaki te whakarite me te hoahoa i ngā hua kia rite ki ō rātou ake hiahia. Ka whakaratohia e Arex te tautoko hangarau me te ratonga tīma e tika ana mō ngā kiritaki e hiahia ana.