BRB FAQ:(units in reserves vs abilities)
Q: If a unit is in reserve, and it has an ability that occurs at
the start of a turn can they use that ability on the turn they
A: No. Unless specifically stated otherwise.
GK Psychic Communion(reserve manipulation)
...This power is used at the beginning of the Grey Knights Movement Phase. If the psychic test is successful, you can modify any reserve rolls made this phase by by +1 or -1...
Okay, now this (kind of) smacks of lawyering, and may be answered somewhere I am not seeing, BUT...I am finding nothing in the rules that would prevent a GK IC with this power from manipulating his(or other units) reserve rolls while he is in reserve.
Beat me up if I am missing something obvious, or has already been discussed to death, but am I wrong?