The NS-CR4M internal trimpots are:
Mag Level
Piezo
-Blend
-Pizz
-Arco
The Mag string-string balanced is managed by the pickup height adjustment, and no user adjustable piezo string balance. Make sure the bridge is centered in the "slot" and not touching either side.
In my experience the neck relief and overall setup plays a huge part in the response of the instrument. I have Spiro Mittles and fiddled (?) quite a bit with all the parameters till I got to a point I was happy. I have also found that rolling off some bass eq (11 o'clock for me) significantly un-masks the G and D fundamental thru an amp.
These links provides some general info.
http://www.nedsteinberger.com/faq/faq.html http://www.nedsteinberger.com/instru...ss-instruc.htm
I think you'll find David (david@nedsteinberger.com) to be a very helpful support resource if it comes to that.