O le servo rocker arm e fa'apipi'i eletise ma le masini vili fa'atasi ma le laulau pa'i, malosi mea e fa'afetaui ai.
Meiwha Electric Tapping Machine, fa'aaogaina le masini eletise eletise sili ona lelei.Faʻaaogaina mo uʻamea, alumini, palasitika laupapa ma isi tapping.