I recently got a GSO Dobsonian 8 inch professional.
I find the azimuth movement too smooth. It even moves with small gust of wind.
I tried tightening the screw provided at the base to no avail.
Does anyone have any other suggestion?
Can you share a video of this? Tighten the screw at the base as much as possible and take a video while gently nudging the mount. There are a few GSO owners here including me and we can see how different it is compared to ours. If it looks too bad, you can take it up with the vendor.