oh yes... slips shud play more imp role during the spin bowling part...and hey ...i forgot to tell this, in a green pitch, wen u are bowling a 'normal' straight delivery, it sumtimes pitches right at its seam and huge movement in/out , wich is superbbb in ur patch...but, the keeper leaves the ball...hehe..so, always ends up wid 4 byes..so, dat also is stupid...its been in evry patch, i forgot to tell it out...so, satish , c if u can make the keeper catch those seaming deliveries also...just try it, bowl a just short of gud-length straight ball, and it suddnly mite seam either way and keeper anticipates for th straighter one only and the ball goes right way for byes...n yes, as 'cricket_60' says dat edges rarely goin to keepers in medium pacers...u can do sumthng on dat too..VAKAAO!!