Sistemụ mgbawa aka nke LEBUS nwere otu ụzọ mkpụkpọ dị n'elu nke akpọchiri ma ọ bụ gbado ya n'ime drum dị ụtọ iji nye ụkpụrụ ntugharị.Ma ọ bụ helical ma ọ bụ LEBUS myirịta grooves nwere ike ịkpụrụ n'ime aka uwe.
Dị ka ọ dị n'ọgba LEBUS niile, a na-emezi ụzọ mgbawa na uwe aka gbawara agbawa ka ọ dakọtara kpọmkwem ihe owuwu eriri, dayameta na ogologo, yana dabara ngwa ahụ.
Mgbe gbawara agbawa ụdị drum nsu akpụkpọ arụnyere, kewara ngere akpụkpọ aka uwe na- ọbọp na-eji ire ụtọ slotless drum, na na-akpachi anya ejikọrọ na drum site bolts ma ọ bụ ịgbado ọkụ, nke mere na mbụ ezigbo elu nke drum n'èzí n'elu na-aghọ ụdị. nke lebus okpukpu abụọ na-apịaji eriri eriri, nke dị mma maka ngwa nke mgbanwe winch ma ọ bụ nnọchi nke drum.