Well since most of us agree that this is a Sativa or Sativa dominant strain, you probably have a longer flowering cycle than 8 weeks for sure, your buds look great in the pics. Remember that buds put on a majority of their weight in the last few weeks before harvest. Also, Sativas' have a bit more of a window of peak harvest than an Indica does. With an Indica, you basically have one week or so to harvest in it's peak. Sativas' will give you an additional week to harvest when in its peak. Get a lense (buy one online if you have to for like $12). Look at the trichomes. When they are really starting to turn from milky to about 1/3 amber, you are at the beginning of the peak for harvest so get a scope and take a look... It's that simple. And please dry and cure properly as your plants look great so you don't want to mess it up at the end by getting lazy during drying and curing...