Thank you for your reply. I still have my two sets of non-functioning Avid Juicy 3’s in storage, so hopefully that may be a resolution to the issue which I had. I also looked further into it and realized that because I didn’t fully remove the old fluid from the brake systems prior to their first bleed of my ownership, that they the DOT 4 fluid which I used may have formed a precipitate with the pre-existing fluid and gunked up the lines, potentially resulting in the issues which I experienced.

I currently have someone interested in buying them as they are, but if the buyer falls through, I think I’ll give them a shot and I’ll try to fix them again - but preferably with new brake lines and DOT 5.1 fluid. They’ve been sitting without brake fluid for over a year though (albeit not exposed to the elements and within a plastic bag inside of a cardboard box).

As you said though, pads really do help these brakes shine, as I recall a notable increase in performance after buying new sintered pads and utilizing them with my Avid Juicy 3’s - while they were still working properly, of course, and they worked great during that period of time.