Demonstration Speech Evaluation

I did a demonstrative speech on how to replace an Ipod battery. Basically, I wanted to show everyone in the class how to do this themselves on order to save money and be more independent from Apple store repairmen. I showed everyone how to open the Ipod, how to remove the battery, told them where to find a new battery, and finally I showed them how to put in the new battery and close up the Ipod.
During my speech I felt that I was fairly confident and enthused although I could have done a better job as I was pretty nervous. I was loud enough for everyone to hear and I felt that I looked into the audience appropriately. During the presentation of the steps I tried to hold up the Ipod so that everyone in the room could see what how I was performing all of the steps; but the Ipod was rather small and some people in the back may have had a hard time seeing what I was exactly doing.
Having an actual Ipod with me to show everyone was a great tool to have because it was really the only way to fully explain to everyone in the room how the process works. I feel that everyone was really interested in the visual aid because with each step when i held up the Ipod to the audience I noticed that many people leaned forward for a better look.
I would consider this topic again as I know how to do it well and it is interesting to me. I would make some changes to my speech though; such as my nervousness and I would prepare better for it. If I had to do this speech again, I would prepare for it better and that would be all I needed to improve.