46 Days into flower: How long til i should chop?

Howdy.
I've got three lovely ladies under ~650W of Floro/CFL lighting, 46 days into flower.
They're all coming along nicely but i'm looking for input on when i should chop.
Here come the pics, i tried to snap ones of the whole plant, main cola, and some side nugs.

Starting with my tallest lady, THSeeds Burmese Kush.



THSeeds website claims BuKu finishes in 50-55 days, but im not sure thats spot-on. The calyxes are starting to swell up now, but i'm thinking she's got another 2-3 weeks at the least. Any comments would be appreciated.

Now moving on, Next is my THSeeds S.A.G.E.



Im expecting another 2-3 on this one as well, but from what ive seen on posts around here i may be in for 4-5 more weeks. Anyone have experience with SAGE?

Third is my shortest plant, Reserva Privada LA Confidential Cheese. Shes always been shorter than the other two, and is filling out nicely. I have no clue when she may finish, so again im looking for any input



Thanks for lookin,
Time for Bongloads

Only receding pistils on the first plant.
The calyxes do look at bit swollen but it's not ready yet.

How are the trichomes looking?

You need to check for those 3 things to determine maturity.

The way i chop my girls are by the trichomes,i take my microscope and individually check all my plants i look for a mix of cloudy and amber trichs then shes ready for me,as soon as the trichomes turn cloudy u can pick,clear trichomes are not pyscho-active and your smoke would be pre mature and not to its full real potency... waiting is the hardest part ,get a handheld microscope and enjoy loooking at your plants while your waiting!