grady does have a great tape on banking.....might want to look at it
theres all these systems, but all you can do is just hit alot of banks and file them away. I read an article that said most pros dont use any system, they just do it by feel, and after trying to memorize some of those systems and use them in play i agreed with the article and now i do too lol.
for rail shots, best i can tell you is just do your best to hit the ball and cushion at the same time, shoot softer, the harder you hit it the smaller the pocket gets. Of course there are times where you need to slightly hit the cushion first but thats a running thing and we're working on walking right now.