I am also a new owner to a set of reference + souther TQ1.
I have tried two cartridges on it, Benz MC gold and Vdh the Frog, and have the following findings:
With frog, (VTF 1.35-1.5g, antiskating 0.35g optimal), the souther arm is set at a high angle inclined towards the centre of the platter. I tried set the arm parallel to the platter, the result is the frog mistrack quite frequently and the cartridge seems to have difficulties to move along the arm, and sometimes even stucked in the midway. After setting the arm at an abnormal way (steep towards the centre), the sound is quite good and smooth, however VTF varies from outter loop to inner loop by about 0.1g (heavier inner). I also used Telarc Omnidisc to test the antiskating distortion and found the result quite good at this setting.
with MC Gold, the arm is set more or less level with the platter, and slightly inclined towards the centre (slight only), and the cartridge is running okay along the bar. I talked to the local agent and they told me the arm has to be set slightly inclined, even for Clearaudio cartridges.
I also agree that the tracking is now very sensitive to dust on the vinyl discs. I believe this shows the high fidelity and senstivity of the design along the signal path.
BTW, I also find the position of the tonearm wire will seriously affect the VTF. Be patient to try the best position, but very annoying...