I think you know I have been wrestling around with that also. As you saw I went ahead and put up something 😮. We will see what comes of it. My take is that timing might be fairly obvious with Sativa's (of which I now have a few and have observed how lanky they get) My grow with Indica has not been that obvious. They just squat and grow, and I could never figure them out. My guess is that "when" with photos is really "whenever". To me these would be the personal factors on my next grow: Do I have enough grow sites on each branch to make tops? At what height do I want my canopy? How much total height do I have? (plus lights, I forgot to hence Meristem supercrop.) Do I want to grow to the netting or LST or Supercrop to set my net and canopy height? My thinking is that if you know you are going to Scrog you can be fairly aggressive with topping or FIMming early on. After saying all of this I don't think there is any definite answer. Just sorta however you want to work it. Best of Luck to ya! I think you are going to do great!