http://web.mta.info/nyct/service/pdf/tqcur.pdf
the Coney Island weekday section is fully scheduled but after 6:29AM to Ditmars, the next train terminates at 57 St until the next one at 7:25AM (3 out of 4 terminate at 57 St for the AM Rush)
I know the swaps sets during the weekdays but today, going to Manhattan, a train arrived and it was a Unionport set.
*A unionport set does pop up on the on the weekend but the is all regular sets from the yard (6691-7080)