Basis Vector 4 arm question

The amount that AJ recommends should be the minimum amount to use. You can experiment with more but I wouldn't recommend using less.

I agree with Gslone and Dre, the Vector has to have damping fluid to work properly. Start with just enough to reach that vertical bearing.

Thanks for your responses,cartridge is a Koetsu red,I think maybe I need to experiment with the level,I am happy with VTA and VTF,azimuth is fixed,it's just a tad bright on some tracks,which I never noticed with the Koetsu on my previous VPI SSM.

Azimuth is adjusted for a level headshell at the factory. The adjustment location is on the lower right side of the pivot location toward the front. It's hidden below the rim of the damping fluid cup. I would not suggest adjusting it unless you are comfortable doing so. The adjustment if very sensitive as well.

If the koetsu is slightly bright, the two parameters I'd check would be VTA and phonostage loading. That is if you are sure VTF is correct, the alignment is right, the cartridge is secure in the headshell, and the damping fluid covers the bottom of the arm.

Phonostage is an ARC PH5,now fitted with the Russian Rocket tubes,used to use 500ohm on the VPI,have now set to 100,tracking at 1.9 grammes,as before,have been playing with the VTA this afternoon and that seems to be going in the right direction,have yet to settle on the optimum setting,but am getting there.
Thanks for your advice,whilst the arm is the easiest unipivot I have ever set up,fine tuning is another matter and not just the arm,with this arm fitted to the 2200,I found the prodigiuos bass masked the midrange on my speakers,fitting bungs in the ports has cured this.