All of you got me thinking about this and I had to make a list because it shocked me how many I have in my system. When you run out of the big buck pieces I guess the tweaks have been the gravy on the potatoes. Some are serious, some are for fun. Added a list of 18 items to my TN Systems page.
My Favorite Tweaks, What is yours?
My favorite tweak is Puron lowering noise floor of my system. Holostage they open my system more, bigger soundstage , improves layering as well ,and made my system more effortless to listen.