A system is used to reproduce the sound of a stringed instrument and provided with hammers to strike the strings. The mask preferably comprises two layers of photoresist separated by a layer of light blocking material. In an embodiment, the arrowhead comprises a shaft having a pointed end and at least one lobe mounted on the shaft. A signal source is in communication with the first downhole network and a signal receiver is in communication with the second downhole network; and a common clock source is in communication with both the signal source and the signal receiver over the first and second downhole networks, respectively. In another aspect, a control input of the regulator circuit receives a current that is the sum of the internal supply current consumed by the regulator circuit and a feedback current. In combination these traits set \u2018WHITE GOLD\u2019 apart from all other existing varieties of Lantana known to the inventor.