I followed the video by @TheGoofy and made the normal slew bearing, but then I wanted to add teeth to drive it, so I followed http://brianzawesomeblog.blogspot.com/2018/01/making-gears-for-3d-printing-using.html and designed a gear set for it.
Category: PartsThe author marked this model as their own original creation. Imported from Thingiverse.