When do I start taking FLs?

I’ve been averaging a 507:

Unscored: 505 (127/126/127/126) FL1: 508 (130/122/128/128) FL2 507 (130/122/128/127)

My goal is a 515+

Do I continue taking weekly FLs? I have 12 Kaplan + 4 AAMC so more than enough.