>>1902179>>1902251>>1902306To add to both, make sure you keep all nodes and handles parallel in placement and handles in order to help keep the lineart smooth and consistent. This will add a considerable amount of time to your vectors, so you must have the patience in order to get this right. You will most likely not get it right on the first try, so you really have to be motivated to do multiple vectors (generally 5-6) to really nail it down.
Good luck. Post the results here and I'll be sure to critique them.
PS: Pirate the latest Illustrator CC for the best experience.