Menno Gazendam is author of Spin Bowling Project. Get your free 8 week spin bowling course here
The backspinner, or zooter, is not that hard to bowl.
That's the ball where you push it out the side of the hand with backward revolutions. It is certainly not easy, but it is within the grasp of most good leggies. It’s simply a matter of understanding what a back spinner really is, and working hard enough at perfecting it.
The biggest problem I found with trying to bowl the leg spinning back spinner most spinners think that the angle should be vertical down the pitch. That the ball must be a perfect opposite of a top spinner. And if they do not get this right they have not mastered the delivery yet.
This is not necessary.
The seam can still be angled (it really is difficult to get a perfect up-and-down seam for the back spinner). Once it pitches and enough revolutions is on it, it will still 'hold up' on the pitch and shoot through lower.
As long as most of the ball is in the right position it will work. A few degrees angle here and there will not matter at all.
Remember to practice your backspinner by "going-round-the-loop" (Peter Philpott’s method), which means you go round from googly to top spinner, leggie to back spinner: Then start over again. Otherwise you might perfect the back spinner, but lose your big spinning normal leggie. And you do not want that to happen.
So, do not worry about a perfect seam angle with the leg spinner. You should still bowl it, even if not perfect. Wickets will come - I promise - and besides, how else are you going to improve it if you do not bowl it in games?