I have gone thru the drive mechanics thread several times in the past year or so. I have ADD so sometimes it takes me a few times to absorb the info and have a deep enough understanding to help DD. I also admit that sometimes I am not ready to have full understanding of things. This video by Javasource is outstanding and presented in a clear and simplistic format for people like me. The slow motion analysis video is the best I have seen. Thank you for putting this info. together for others to use.
https://www.youtube.com/watch?v=QBvFc-8wWLU
https://www.youtube.com/watch?v=QBvFc-8wWLU