If I could add to duomike's list of great tweaks, decoupling
the screws on the tweeter front plate for a little more naturalness.
I made a very very thin slice of Sorbothane, by shaving a footer & placed it on the lugs where the tweeter screws screw into.
Silver wiring the speaker cables inside the sub if you can face it! Try solidcore cable.
I have found in my set up solidcore cables work very well on the Trio, especially if using flea power. Gives a little more focus & dynamic poise.