Igishushanyo mbonera cya tumble cyemewe cyane nkimwe muburyo bukomeye bwo guturika kugirango ukureho igipimo, ingese na burrs biva mubice byinshi.Uwitekaimashini iturika'umukandara utagira iherezo uzunguruka buhoro buhoro ibice byakazi kandi ubyerekeze kumurongo wo gukuramo igihe cyose.