Well I've got as far as testing and mapping out the wiring to the plug. So It's a four conductor, Tip Ring Ring Sleeve plug. The earphone pieces are wired in parallel, which is great as the 19 ohm earpieces in parallel come to 10.5 measured at the connector. So the Tip and the second ring away from the tip are connected to the microphone element. The first ring from the tip goes to the white earphone wire, while the sleeve goes to the black earphone wire. Each earphone "cup" has a black wire and a white wire. The earphone pieces themselves are loose and there is no material around them. Should I just cut a piece of foam to fit and maybe a dab of hot glue on the bottom of the element to secure it?