but your GND is now directly connected to the main PSU and transformer....the purety in the previous was that the CCS shielded the GND or low voltage ans the higher rail was regulated..So you by those choices took the PSU effectively out of the loop.. Now you put them back in..??
I do not think that one should pay attention on which PS rail the serial filtering is. In the present form, it simply looks more logical, to put it onto the Negative rail.
