Originally Posted by
mnmag
I can see where the 'combining' of points to a diamond's account redemption may not be feasible if the diamond actually has the 'necessary number' of GP points for the requested redemption!
It's always feasible for a Diamond if the Diamond has a few days to let the combination+redemption process take place and is willing to let the Diamond account be temporarily depleted (at least almost completely).
A Diamond can temporarily deplete the Diamond account of points by making some other (free-cancel) award reservations using points from their own account and then put in for the combining of points from another account.