Trichome Colour

Sorry about the quality of the photo's. The microscope is new, I'm not too good at using it yet.
Do these look like they've a bit to go yet?

I can see some cloudy but mostly clear. For what it's worth I personally would wait a couple more weeks.

Cheers, That would make it 12 weeks in flowering, about right for a sativa.

I think you're ready to harvest! Especially if you want that energetic high! And less of a ripped off your ass on the couch type of thing. :] You could always go another week or 2 but watch them close, if they start getting amber then you have a few days window in order to harvest.