So, bought three tweeters caps and screws. Did the "easy mod" of the 3.9uf cap and Peerless tweeter and - I don't like it! Disappointed, as I expected an improvement over stock, maybe I'm just used to the original sound. Hard to describe, there is more "presence" with the original tweeters and listening to something like Dave Mathews playing some nice licks doesn't sound as forward with the Peerless tweeters. Mine are from Dec 2012, maybe some of the first batches and the tweeters were better then? Who knows... Anywho, I have a pair of 22's we use for gaming, etc. perhaps I'll put the Peerless in those and move the towers down stairs for gaming (have a Dayton sub I can use with the 22's). If I don't, glad to send them to someone for less than new if Parts Express doesn't take them back or charges restock or some such!
I'm going to keep the 3rd one to upgrade the center channel, seems to help there with a bit more clarity.
Perhaps I'm just totally ruined now anyway, I meandered into Best Buy's "Magnolia" room and heard these for the first time (I haven't gone real speaker shopping since buy New Large Advents in 1978): https://www.bowerswilkins.com/home-audio/804-d3
Even made my wife say, impulsively, "How much are THOSE, I REALLY like them!" If only...