But i followed some of the post for people having the initial outside hkg they were only 6 hours.... What other extra things do they evaluate you
Not exactly sure.
My Stage 1 itinerary was for 3 hours, with only a JK Test and interview scheduled, each lasting 45 minutes. In reality it took longer than that, it took something around 3 hours from start to finish, with the extra 90 minutes ending up merely as a buffer. I'm guessing it will be the same in your case.