Munzvimbo yokuongorora oiri negesi, chisarudzo chemidziyo yokudzisa inogona kutapura zvikuru kushanda kunobudirira nokushanda. Imwe yemidziyo yakakurumbira zvikurusa inoshandiswa mukudhira mitambo inoitwa tricone, zvikurukuru kusiyana kwa8 1/2. Izvi zvinoratidzirwa nemakono matatu anotenderera, rimwe nerimwe rakashongedzwa nemazino akapinza akagadzirirwa kupwanya matombo, zvichiita chisarudzo chakanaka