I really don't have time to be measuring my bike as I'm a student myself, but good luck! I remember using Autodesk Inventor in high school and it was really fun. Played around with the idea of going into engineering myself but once I looked into it it really wasn't my thing. After becoming an education major I really left all that stuff behind, but it's fun to go back and mess with the newest cad programs every once in awhile.
If you havn't really started on the project you could always do your f4i, but I can see where the 919 could maybe be easier in the long run. Or, if you're willing, you could always kind of make your own bike just based off of another bike, so you could have some creative freedom with it, but that's only if your professor is ok with it.
meh, it will come out nice either way!