Usually the right time to harvest is when about half the pistols are ambering...
You really want to be looking at the trichromes.
They appear clear right now, early on, but as harvest gets near, they will turn cloudy white. When most are cloudy white, that's when you'll have the peak THC content.
If you let them go for longer, the THC will convert to CBN, which makes you sleepy, narcotic.
Depending on the strains THC vs CBN content, you might want to harvest earlier than you were thinking.
Look at the trichromes not the pistols. Sometimes the growing tip won't stop because of overfeeding, no flush, or excess light... So judging the pistols won't work... And the majority of the bud will already have converted from THC to CBN.
If you want to test it, let one go for longer, and you'll see.
Also for your particular garden, the sativas are going to take a lot longer than the squatty indicas. The indicas should be finished in 3 more weeks, while the sativas could possibly need up to 6 more weeks. Growing clones from the same strain over and over allows you to know how long it takes to finish flowering.