Back to the Hemp cable, how about medical hemp cable, to keep within the spirit of the law. After all, The USA is a nation of laws and that fact alone will keep Frank's new product legit. I would assume that it will have a higher user tax and may require a prescription from your local audiologist, but after that, hemp away.
Aah, automated cable elevators! Now you are getting really creative. I can once again apply my trade to the AVA line. This will require some motorized actuator arms, controlled thru PLC logic, so we are going to need a bunch of 12 volt solid state power supplies, DIN rail, fuses and circuit breakers and of course terminal blocks, Iboco wireway and perhaps a couple of Hoffman utility boxes to house the whole thing in. If the left side needs to be adjusted differently then the right side, we will need additional analog output PLC modules and proximity sensors to make the whole thing work. I like it! Oh yeah, we'll need a wireless resistive load touch screen to talk to the PLC.
Wayner