[markus.a.bergh]

Sywatcher focser is crap (sorry) compared to the GSO.

Re - the "AZ motion". Its all in the grease. When you assemble it, add (lots of) clear viscous bearing grease and use a liberal amount with a small amount of singers sowing oil (or similar). You can get nice clear grease form a budget bicycle shop. This will give you a smooth action. Everyone is different. Slow and smooth works well for me. Some people knock the GSO needle roller bearings. They work perfectly fine as long as you lube them properly - to suit your needs. Grease is the word.