AFTER setting up syncing (via iTunes to sync iCal with my iPad and other devices), do I have to MANUALLY sync iCAL each time to my devices OR can I set it up to SYNC AUTOMATICALLY; and if I can sycn automaticall, then HOW OFTEN will a sync be done automatically and can I set the frequency? I am not asking how to SET UP to sync. I have already done that. I am asking HOW TO ACTUALLY PERFORM THE SYNC and CAN I GET devices such as my iPAD to SYNC with iCAL automatically? Thank you.