Peter Osmond gave an interesting talk at NACAA about a DIY pointing system he designed and built.
https://nacaa.org.au/2022/event/1926
I think you need to join an create an account for access to the videos of the talk.
I think the videos are by session so you’re going to have to fast forward through the first 45 min talk to get to Peter’s talk that was second in the session.
Joe