I sent mine 96 days before my expiration date because uscis was developing the renewal app. However, i would not jeopardize my renewal just to be out on AP. What is more important for you? You could definitely lose everything.
__________________
:

2nd Time Renewal Update: App sent-3/21/16 to AZ via USPS Delivered- 3/24/16 I-797 Notice Action Received- 3/26/16 G-1145 Notification -3/28 Date of Biometrics appt 4/11/16

AOS App 1/17/17 Bio 2/10 - Ead/AP - 4/28 Interview - 11/14 - Green card 11-25