Eureka. You've cracked the big idea. You now have a choice. File your precious radio script away until the recording session? Or give it the same respect as your TV scripts and enlist expert help to bring it to life?
In jury rooms around the globe, the execution of a great idea is usually the difference between silver and gold or gold and grand prix. Unexpected casting, authentic performances, getting creative with the voice-over bit, layered sound design ... that's what will determine whether someone hears your idea, or feels it.