ok...i understand that the Swing Bass set is the box with the lion on it, right? for the stainless steel strings. orange box. but...the nickel strings. there is a box that is blue and it's for nickel strings. then, there is a box for nickel strings but it's not blue. i think it has a black and white pic on it? and it's usually more expensive than the blue box of nickel strings... what's the difference? i'de like to try a set for my P bass. looking for a good strong P bass round wound string that will but through. what's with the different string boxes? anyone?