Autek Research QF-1A AM SSB CW Filter Anybody Use One?

[RCCI]

I bought one of these online a short time ago, and have had fun and frustration going through the "learning curve" of using it. I try and use the manual, and keep re-reading it, but it seems like there is only limited success. Does anyone else use one of these filters? Are there any tricks to using one? My settings always seem to vary, with the Peak, Notch, etc. for the many varied receive modes. I looked on eHam and found some tips by two reviewers.

The manual seems a bit confusing, for my rather limited radio skill set. Could someone break it down for me on how to fine tune this filter?   ...Steve