I found 3 unlisted training videos from TNT NorCal on a
non-profit web page out of Clovis. If you are into the working of
the stands, these are very interesting, particularly for DFS.
https://www.k6arp.org/content.aspx?page_id=22&club_id=846396&module_id=574482
About halfway down the page, there are links to 3 videos.