Greetings from the house of Galibier,
Play around with the tightness of the screw that locks down the counterweight. Frank has shown me that in most cases a *very* light touch is required on this screw. You'll get a more live sound this way - not ringing or "ragged" in any sense, but more dynamic - similar to what you hear by separating the magnets a bit.
Keeping the counterweight screw barely tight allows you to use more damping on the magnets (closer spacing) so that the arm tracks dynamic passages more gracefully. If you keep the counterweight screw too tight, you will find yourself opening up the magnet gap more to compensate for the lost dynamics. The problem with this is that you won't track dynamic passages as well.
All of this is not very obvious, and even if you don't do it, you have an incredible sounding tonearm. If you pay this last bit of attention, you'll be making better sound than most owners, and many dealers.
Similarly, with many cartridges, the tightness of the central headshell screw (the hex screw) can be used to tune the dynamics. It's a surprisingly loose setting - almost to the point where you feel as if the cartridge can get moved out of position with a gentle twist. If you play with these two settings you'll know more about your Schroeder than 98% of the owners out there.
ZYX cartridges without any of the factory weights - use the brass cartridge carrier (adds 5 gms).