Hey @Letsgrowmore,
To touch on your extension question, as I’m sure you have read, many growers do recommend growing to the bottom of the second fan for sativa/sativa dominant genetics and the top of the second fan for indica/indica dominant genetics. That said, many have also suggested that for your first grow with a certain genetic (and especially your first grow ever) to be very cautious when extending as you are not aware of how high it will stretch in your environment and should the plant become too tall you will most certainly experience significant detrimental issues.
In conclusion (take with a grain of salt as I am just as new to this as you are), I would recommend extending for one week to account for the recovery of topping your plant and then reevaluating and deciding whether or not to add another week. Question to ask yourself over the coming week, what are your goals with this grow? Is yield one of your top priorities? High enough for the risk of your plant being too tall for the Grobo to be considered “worth it”? If so, veg it out to the bottom of the second fan. If not, flip to transition and let’s watch that baby stretch!
Love watching your grow, I’m right behind you by a few days, very cool to be able to compare the two!