I thought it would be good to start a Discussion on an Electrical Slip Ring so that the tether can be put on a spool and unwound as needed. I have ordered up the following item: http://www.ebay.com/itm/271157596689?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 which I would like to test.
This one has 12 circuits using 30AWG wire and my thought was to use 6 for each of the two wires on the tether. This in my mind will give a better connection with less noise and a higher current capability if needed, or you can use the extra contacts for any additional wires that you may be using in your theter.
There are many versions of these slip rings and I am not sure which would be the best to use and maybe someone has already gone down this road and done some testing.