The three basic blade types are willowleaf (top), Indiana (middle), and Colorado (bottom). In general, the slim profile of the willowleaf is designed to perform best at high speeds, where it can deliver a lot of flash. The rounder Colorado spins slowly and doesn't put out as much flash. The blade in the middle--the Indiana--is a compromise that works best when retrieved at moderate speeds. If bass are hitting but consistently missing the lures, change blade color (say, from silver to gold) before changing type. To provide a completely different look, remove the spinnerbait skirt and replace it with a soft-plastic worm, a grub, or even a tube lure. Retrieve the lure just as you would one with a regular skirt.