Mathematical modeling allows flexibility for a project-based experience. We share details of our regular capstone course, successful for virtually 100% of our math majors for almost two decades. Our research-like approach in this course accommodates a variety of student backgrounds and interests, and has produced some award-winning student conference presentations. This process satisfies some national guidelines in helping students practice good mathematical investigation, effective use of technology, and competent written and oral communication. The timeline, structure, rubric, development of student presentation skills, and reflections that are shared could be useful in a variety of project-based curricula.