IECHO fou BK4 tipitipi faiga e mo le laulau tasi (itiiti layers) tipiina, e mafai ona galue i luga o le faagasologa otometi ma saʻo, e pei e ala i tipi, milling, V tootoo, maka, ma isi E mafai ona faaaoga lautele i totonu o alamanuia o taavale totonu, faasalalauga, meaafale ma tuʻufaʻatasia, ma isi BK4 tipi faiga, ma lona saʻo maualuga ma le lelei, e tuʻuina atu faʻataʻitaʻiina fofo tipi i ituaiga eseese o alamanuia.