'For me, this is completely the wrong way to sweep. You can't sweep a yorker length outside leg stump. Sweeping is ALL about being able to pick up length. You always, always, always sweep on length. If you work out what your sweepable length is (full stretch in front of you - stick a ball on a cone and move it til you find it), you should then be able to sweep anything from a foot outside off stump, to a foot outside leg. Just a matter of where it gets hit... obviously the further outside off stump. the straighter it will go!'
'valid point but this plan may be too risky for non sweeper'
I agree with both of these points. My foot movement has always been absolute pants, yet against all the odds I can play the sweep quite naturally. For me it is really all about length, though due to my normal lack of foot movement the line has to be right for me too - around or outside leg stump.
There's just a certain length that has me almost over reaching and I find I'm down on one knee and sweeping it.
As has also been suggested, in my case I can go months without getting a delivery that draws me into the shot.