Let's take this discussion to PM or a phone call- - - - -I spent 30+ years teaching automotive subjects, including electrical systems, to barely literate high school students from inner city ghettos, but not via the internet. A 2-way conversation is always better than a cyberspace keyboard battle.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!