For the azimuth hex screw, I've found that it can be quite sticky when trying to tighten it down, which becomes more problematic because the when you loosen the hex screw to make an adjustment, and then tighten it down. When you go to tighten the hex screw, this will put pressure on the headshell itself causing your 'fine adjustment' to go out of adjustment.
So I had some silicone spray on hand and took out the hex screw and gave it a small dose of silicone, now the hex screw is nice and smooth for tightening/loosening and does not stick.
So I had some silicone spray on hand and took out the hex screw and gave it a small dose of silicone, now the hex screw is nice and smooth for tightening/loosening and does not stick.