Do you have any close up pictures of the bud or trichomes?
It's hard to see from these pictures, but one of the fairly easy ways to gage when you are approaching finish without the use of a macro lense or anything, is to eyeball the hairs on the buds. If most of them are still white and sticking string up, (which it looks like in the picture but might just be the lighting and quality of the pic) then you still have weeks ahead of you. You wanna wait until most of them have turned that nice orangey brown color
What are you using to check the trichomes?