So almost have the layout completed in blender. I'm posting some pics.

Modeled the donor headset board in blender, trying to reuse as many of the original parts as possible, both with and with out some additions like an amplifier.

It would be nice if this were a build others could replicate too. ;) The parts need to be readily sourceable and one of the big considerations is that normal parts are huge when you're working at this scale. I mean a regular radioshack microswitch is gigantic. lol. 

I'll post more in the next day or 2.