One, hopefully one final question before I book this all up (ordered my International Student Card last night so will book my trip as soon as I've got my number).

If, between CHI and NFS, I do as has been suggested and change at Syracuse or Rochester (etc) rather than Buffalo will I have to get my tickets re-issued or anything? I dont' want to get off the Lake Shore a few stops after Buffalo to lessen my waiting time between changes only to find my ticket is no longer valid!

Cheers.