"....Isn't this all covered in the video I posted above?...."

Probably is..
Your video wasn't posted when I started putting together my response.
It takes me , a long while typing w/one finger. Finding the rifle and taking the pics, getting everything to work more time.
I've never been accused of being too quick.
I see it took me about an hour to put that together and post it.
I won't waste my time then.