Sejiren's Septa yopangidwa ndi zopangira zapamwamba kwambiri zimatha kuteteza chidindo mkati mwapakati, ndipo sichitha kapena kugwa kapena kugwera pa chipewa pambuyo pa singano yoyeserera imasungidwa. Izi ndi zazikulu. Zoyeserera za Cromography zimapereka mwayi, ndikubweretsa zotsatira zotetezeka komanso zolondola.