Reach stacker imapereka chithandizo pamalo onyamulira ndi kopitako zotengera zotengera, zimagwira ntchito yofunika kwambiri pamayendedwe, ndipo zimatengera mwayi wogwiritsa ntchito bwino kwambiri komanso kuipitsidwa kochepa mumayendedwe otengera kutengera mawonekedwe ake "abwino kwambiri, obiriwira, komanso opulumutsa mphamvu" .