Hi Sompas, its looking great π
I suggest you give your girl 24 to 48 hours of darkness and then cut her immediatley.
You will have more resin and terps by stressing your plant.
Back to the trichomes and hairs.
Its mostly about the trichomes if you want to check if you plant is ready for harvest.
You said it yourself, 90%cloudy is really great but the amber trichomes degrades your bud.
So my advice to you is dont even let them get amber at all if you can (10 % in your case), only cloudy or milky.
Hope that this was an helpfull answer.
Keep on growing and Peace my friendππ