1.Ikoranabuhanga ryihariye rya bolt ryemerera abakoresha guhindura intebe yintebe hamwe ninyuma icyarimwe.
2.Gukurura hasi na pulley biroroshye kubikoresho byimuka.
3.Hariho impande 7 zitandukanye zishobora guhinduka kuva kuryama kugeza kuri dogere 70.