I looked into TFX PSU's and others, but it looks like it is common that the 12V rail, even if the specs say it is two rails, it actually only has one common rail within the PSU. So that brings up the previous question, can we get away with just one rail that is shared with CRT sweep? I am hesitant to experiment with that question since power issues can bring up subtle problems that I don't have the tools to vet and isolate. Also most new units are now 300W and higher, and fan cooled, so does it make sense to run it at ~20% load @ ~80% efficiency with just passive cooling?