The shot line is the line the CB takes...I disagree with you on that "lead leg". It makes more sense that the right leg is the lead because you use it to step into the shot line. Anyways, they use their left leg also to get in the right pisition for the shot and not "the shot line". There is not one shot line for a 30 degree shot. Position of the balls changes the shot line............
So yes, there is just one shot line for a 30 degree cut. And this is why the lead leg, peg leg, third leg, or what ever you want to call it differs from shot to shot. Snooker players do not position them selves around the OB ball, but around the lone of the shot...remember, this is the line the CB must take to pocket the OB ;-) so that is why you may think they adjust their front leg from shot to shot. In reality they have exactly the same set up in relation to the line the CB must travel towards the OB. This goes for pocketing the ball, playing safe, or kicking.
The "lead leg" is called that in snooker because of just that. It is in the "lead", ie front, when your stance is set. We refer to the right leg for a right hander as the "back leg", "step leg" or "locked leg".
If you can create a PSR that is the same each time and a stance that is also the same each time in relation to the line of the shot then you are on your way to playing decent pool or snooker.
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