I am a chemical engineering student, and I am also heading into my senior design courses. I’ve actually grown comfortable with presentations through practice. I took a public speaking course as a freshman (that wasn’t required) that helped my confidence. I also have to present to my research group all the time, and while I still stutter during the presentations, I’ve learned to not give a shit about my stuttering. There is no sense in worrying about stuttering, just make sure you know what you are talking about and you should be good.