I'm building my cable length's. Choosing Mogami Analog 4' snakes would be really clean but you never know if those cables might be needed down the path at a longer lenght. How many times do we say that after the fact. Questions: Has anyone ever added an extension to 25PIN DSUB 8 channel snake to add extra length for analog? pro's cons? High end audio: Is there a noticeable latency or audio degradation from 4' to 16'