Let me save you some reading chief.. Let plant veg a few weeks and then cut the top off.. You can thank me later lol
Don't get offended but I think you may have it wrong my friend. I thought the same thing for many years.
From my understanding, just topping after 3 or 4 weeks in veg will create new (2 and then 4 etc..) branches, but, this is very different than actual topping which has to be cut at the 1st or 2nd node before any alternating of nodes begins. This creates hormonal redistribution (within 24 hours) which causes 2 or 4 main colas to start. Any topping not done this way is nothing more than cutting back and creating a shorter, bushier plant, not 2 or 4 new main colas. This includes all normal side branching from each cola instead of just the center cola.
I won't write any more in here on topping but there is a great section under Uncle Ben's Topping Technique here on RIU. Recommended reading for sure
I will be posting pics soon