i have a set of 520s if you are interested. came with my sc kit when i bought it. cannot vouch for them being modified by ct though. just being honest. not to say i have any reason to believe they weren't, just saying i got them used, so you never know.
not hard. when you're in nursing school and you're doing your clinical rotations in the hospitals just get buddy/buddy with the nurses and especially the nurse managers on the floor that you would like to work at once you graduate. as long as they see you work hard and are interested in their unit they'll prob offer you a job once you graduate as long as you pass the nursing boards. good luck man, lemme know if you have any other questions