Going to take a pass on this one. Bought about $500.00 worth of butterflys, knifes, hopper, etc. and don 't beleive they work any better than my old standbys' raiders, hammered and a few other select jigs. Tried the raiders using the jerk and crank method and they worked well also. Am pretty much convinced its' covering the water column that produces which many pers. have done a long time.
Just my thoughts.