Magic number is four months for CLIs (In my experience). Mark it on a calendar and call four months from now and ask for the $35k and see what/if they counter for. Always a SP with Synchrony so you have nothing to lose, but definitely CALL every time.
Starting Score: (June 2014) TU08: 663 | EQ04: 640 | EX08: 685 Current Score: TU08: 757 | EQ04/08: 757/758 | EX08: 761 Goal Score: 800 across the board
Total Credit Line - $186,050 | Utilization - 16.8%