No matter how you slice it, someone just learning the Rule will have to study it. Any KISS version will necessarily leave out parts of the rule and its application that have to be absorbed through study. Though my 1,2,3 version helps me recall the rest of the Rule, and would have saved me a lot of figuring-out as I was absorbing the rule, it may also help someone as they first encounter the explanation of it. Maybe not. When I was first researching it, I found a site that suggested thinking of the DP/FLEX as Twins. That didn't help me but it may help others. Same with Umpires' KISS. Would love to hear what others use. No matter how complicated someone else might deem it, if it works for you, let's hear it...