Nice. I would give them a bit more time. Mine are a bit farther along (Week 8 or so) and still putting on more weight. No sign of amber yet on mine. One of mine has had great orange all the way through flower. I have one that is just now starting to smell. Like yours it took a while to develop. I am hoping it gets stronger as it finishes. Don't rush it now. I know the waiting is hard. I want to try a test bud so bad it is killing me LMAO. And I' ahead of you LOL.
I was surveying the grow this morning. They don't appear to be adding much more bulk and I do like to harvest before there's much amber in the trichs. BOO #2's chocolate/purple color has really intensified in the past couple of days and starting to see a little more of that in BOO #1. Not sure what it all means but will probably hold off until eight weeks, which is next Wednesday, and re-evaluate then. Figure the plants will let us know when it's time....
About a week ago, I snipped a small, lower bud from BOO #1. Even with a crude, two day open air dry, the smoke was pretty smooth, had good flavor and a nice, uplifting buzz. By all indications, this is going to be some *really* nice smoke. I'd be inclined to reveg one as a mother for cloning, if not for all the other super interesting Useful seeds that I want to try. Curses!! Anyway, stop beating yourself up and try a test bud - for quality control purposes