Some of you guys who like technical stuff and making things might be interested in this.
Not needed of course if you have an equatorlal mount, but I thought it was worth sharing. Looks like he has made his own Dob as well.
He's a member on SGL if you want to discuss or comment with him.
This is the thread
https://stargazerslounge.com/topic/353890-how-to-make-a-field-derotator/
This is the video
https://youtu.be/hLAcbScAecs
Carole