Ko tenei momo keri keri he mea hoahoa me te hanga i runga i nga paerewa API.
He hanganga kiato te rig katoa, he iti nei te waahi whakaurunga na te nui o te whakaurunga.
Ko te tahuhu taumaha me te taraiwa-a-whaiaro: 8x6, 10x8, 12x8,14x8, 14x12, 16x12 me te punaha urungi hydraulic e whakamahia ana, e whakarite ana i te keri keri he huarahi pai, te kaha whakawhiti whenua.