aj523, I wonder if you made any observations:
(a) about your own objectivity, viz a vis price paid vs. results? From what I can tell, you seem to be setting that aside, but what do you think about your own objectivity? (A hard question, but one we can get better at!)
(b) about those tweaks that did nothing but which you suspect was not adequately tested by your setup? Sometimes, I've done something to my system thinking I'd hear a difference, and when I didn't, people have sometimes pointed out things like, "Your noise floor is too high for you to test that" or "You don't have a dedicated power line, so it would be hard to tell."
(a) about your own objectivity, viz a vis price paid vs. results? From what I can tell, you seem to be setting that aside, but what do you think about your own objectivity? (A hard question, but one we can get better at!)
(b) about those tweaks that did nothing but which you suspect was not adequately tested by your setup? Sometimes, I've done something to my system thinking I'd hear a difference, and when I didn't, people have sometimes pointed out things like, "Your noise floor is too high for you to test that" or "You don't have a dedicated power line, so it would be hard to tell."