In my company the control checks are rank specific. The captain does the initial control checks, and I, the F/O, announces them, and does the secondary silent checks.
But how does the captain know that my control checks are correct, since I don't announce the checks, and the captain, who is eyes outside taxying cannot see what I am doing??
If I am PF, how can the captain be sure my controls are wired correctly for the take-off?