I have one of the later GSO (Bintel) Dobs. It has a large neddle roller bearing assembly for the Az.
Reading all your comments and various websites, these teflon pads seem to work, just seem a little sticky.
This needle roller bearing design has no issues with sticking or jerky issues.
It has a needle roller assembly in a plastic cage, sandwiched between 2 thin sheetmetal plates.
To control Az stiffness, you tighten the central screw, compressing the roller assembly.
http://farm4.static.flickr.com/3324/...924064498b.jpg