I tried the rubber band thing for about a decade. I stopped using it, but later found out my cables were probably picking up ripples in space/time from merging neutron stars and black holes. Yeah, this was before LIGO. My system was way too analytical back then.
How much space between cables is enough?
I understand that proximity between power cables and interconnects or power cables and power cables is a problem, but is there a rule of thumb as to how much space is required to NOT be a problem. 1/2", 1", 6"? Also, are all cables the same? I would assume that the higher the current, the more isolation, but belief and reality are seldom the same.