Sure mate!
Keep your eye on the "frost".
When it goes from clear to cloudy/milky, they are getting close.
At about the 7th week of flower the calx at the base of the pistils will begin to swell up and the pistils will brown down.
Grab a 30x lens and scope the glands sitting atop the trichome hairs.
When some are amber, and some are missing, it's time to chop.

After you've grown a strain a few times you can jus' follow your nose.
They start to reek mildly when the pop flowers, but when they ripen the scent changes and increases.
Gettin' so I wake up, sniff the air and say, yeeha, we harvest today!

Aloha,
Weezard