Well it took a little longer than the first 12 months as I had hoped, but finally unlocked Serendipity last night, with the help of some generous longus. Hoping to unlock Medicine next. Skill screens attached - all natural skills - seems to be a lot of variation in when people unlock some of these skills. My handgun HA changed to 3.0 almost a week ago, and I changed to Great Laser Pistoleer shortly after unlocking Serend. So these all seem to be good indicators that you are close, but not a precise clue.