I have added a new page to my site describing the modification to the Orion XT10 to replace the original Teflon bearings with a Lazy Susan turntable bearing.
This is one of the primary mods Dobsonian owners are interested to learn about, in their quest to achieve the smoothest possible Azimuth movement. The standard Teflon bearings suffer from a problem termed “stiction” that causes adjustment of the view in the eyepiece to become quite difficult when observing at high magnifications.
The mod involves the addition of a slimline Lazy Susan turntable with ball or cylinder bearings, but this results in a motion that is so smooth that even the wind can blow the telescope around! So a simple method of replacing some of that “stiction” becomes necessary.
In this section I discuss the main concerns, such as maintaining correct operation of the Intelliscope Computer Object Locator, with references to forum topics, other resources on the internet, including suppliers of suitable Lazy Susan bearings. The mod is done in a non-destructive way, so you can revert to the original Teflon bearings if required.
The page also features a short movie clip demonstrating the effect of the new bearing.