@hiendmmoe "The thing that seems to always follow them is how soon I seem to not recognize the improvement anymore."
Are you saying that the sound has regressed back to where it was prior to the insertion of the tweak? Are you expecting continual incremental improvement even after some reasonable period of tweak break-in? Could it be that what you are experiencing is simply a matter of having become accustomed to the sound post tweak "break-in" and there are no further incremental benefits of said tweak?