There is the tape/film of Crane running 150 and out against Joe Balsis in the
finals of the 1966 US Open, but I don't know who carries it. google... google... google The title is "Clash of the Titans" and there is one site offering it for $14.
I think Crane also appears in some of the "oldtimers" matches that ESPN rebroadcasts.
Remember the title of the thread is "keeping" the cue level. Well, if you're slightly jacked up because of the rail or another ball, do you attempt to get level as you shoot?
No.
You attempt to shoot at the angle you lined up with. The jacked up angle. Keep the stick on this line. Shoot straight into the cloth along this line. Do not level out.
Nothing level about this shot. Nothing "as level as possible" about this shot. And, because of the rail, almost every shot is this way. Very very few shots can you get the cue level.
Level is the wrong word. So is "as close as possible to level."