Mornin Mister!
In answer to your question, after my second topping at node two or three on the new growth from topping at node four I allow them to gain six to eight inches of height over the height of my scrog table. My table stands at 24”. It has legs but I lower it via frogs from the top. Reduces damage and allows for a spreading of the plant to open it.
Just prior to putting them under the table I fim every top that’s large enough to see enough to fim. This does two important things. One it gives you three top sites instead of one and two it takes away all of the plants need to super feed etc the main cola, by passing a lot of other nice flowers. This equals the playing field, and straight up triples the amount of top or main colas.
Clear as mud?
In answer about my top clone, I took her just before I went to flower this last harvest. So she has some age on her, and she grew like a house on fire! I literally have cut her in half and she’s still full steam ahead!
Normally, with my grow rolling as soon as I go to flower, I pop a new set and they are ready or very close as soon as I harvest. I just clean up, reset my tents and we’re off again to another harvest in 10-14 weeks.
I won’t actually go to flower in my tents for another four or so weeks, I just got an opportunity to move them from my veg room into the tents where they can throw down and do some growing. Since this reopens my veg space room I’ll take this opportunity to pop some more!
BEAST
I always miss peoples updates and then I'm having to manually search threads to go back and I see pages of stuff I've missed. 
