I want to comment on the backpin thread but it's too old to register so I'm starting anew.
Several people on that thread said that it's difficult to get good lateral speed on a backpin, hard to get that instant 0 to 100 take-off like a pull shot, and that it's a relatively "slow" shot. This surprises me because I find that I can get better & easier instant take-off lateral speed with my backpin pull than any other shot I've ever done. With the ball behind the rod and my foot on the ball, already cranked back, it's like the shot is already halfway done and all I have to do is finish the shot at the deadman position. I'm swinging the man forward at the same time I'm pulling the rod towards me. It's blazing fast and deadman long, even on the small Tournament Soccer goal.
Alternatively, when I do the push I don't have blazing speed but the motion is so super-smooth people don't seem to see the take-off. I call it my kerplunk shot, I just kerplunk it in. Not as long as the pull but sneaky effective. I do the same thing, basically, as I do with the pull, I swing the man forward at the same time I move the rod laterally. I'm aiming at the far hole and pointing my foot at it as I execute. The take-off isn't so much fast as it is quick.
What opens up the far push & pull holes is the split, which you absolutely have to have to keep the goalie honest. Instead of a short pull split, it's a super-short pull split. Describe a tiny circle with the foot in the pull direction and swing the man forward ever-so-slightly. DON'T SHOOT A PULL, DESCRIBE A TINY CIRCLE! I learned this split in 1976 from a pull shooter from Chicago who appeared to be shooting the ball around & behind the 2bar man. Learn this split with either the backpin or pullshot and the goalie will tighten up their defense and open up the ends of the goal.
When I get my brand new Fireball table next month I intend to practice, practice, practice and get my shot back after a brief 19 year layoff. Then I'm coming after ALL of you!