I inherited some older style xconnections namely in addition to the 4 wires...
T R E M
I also have some 6 pr set conns.
TT T1 RR R1 E M

I think the above concept is 2 wire audio vs 4 wire audio along with the E&M pr.
I will try out what you suggest for both wire arrangements and let you know how it turns out.
Thanks for the help Bill...
M