Itafula I-Mglia itafula eliqokiwe elimise okokukhumbula kwalo ngesikejana, kepha futhi libonisa inhliziyo yawo wonke lowo msebenzi. Umqondo ufundwe ngenxa yokuthuthukiswa kwamamodeli okuqala kusuka kumodeli eyisisekelo ehlongozwe lapha. Ukuqina koxhaxha lwe-dovetail kuhlangene nokuthi kungenzeka ukuthi i-vertebrae inyakaze ngokukhululeka kuyo, iqinisekise ukuqina kwetafula, ivumele ikhule ngobude. Lezi zici zenza ukuba zifinyeleleke kalula endaweni oya kuyo. Kuzokwanela ukwandisa inani lama-vertebrae kanye nobude bethamu ukuthola ubukhulu obufunayo.