Hello Yucapuk, that's a very nice looking bud, I go along with all of the above,
I go by the trichs, and you can easily tell, when they are getting close, by they damn near quit drinking. And the leaves turn yellow, in soil.
But if I had to guess, I'd say you got two more weeks of them buds swelling up and getting larger. Hang in there, you'll be glad you did.
But that sure is a pretty bud. And congratulations. Well done.