Apart from the potential $$ required to achieve CI or MCI status, there’s really no downside to pursuing Casting Instructor skills. A close friend of mind, an MCI who was involved in the early days of the FFI Casting Instructor program and someone I fish with a few times every year has an interesting take on the merits of becoming a Casting Instructor. First regardless of the prospective instructor’s casting skill, they not only make mistakes in their casting, but they probably haven’t made or witnessed all the potential mistakes fly casters make. The CI’s job is to not only identify casting mistakes, but demonstrate them and teach solutions to those mistakes. Teaching newbies is easier because they haven’t had decades of muscle memory doing things the wrong way, regardless how subtle those mistakes might be. Teaching experienced casters is more challenging than one might think. Becoming a CI or MCI isn’t about improving your casting, but instead improving the casting of others. Inevitably, being able to recognize casting mistakes and the ability to teach corrections, will, if you identify and pay attention to your own mistakes, make you a better caster.