Hey Chase,
Check the "advanced marijuana cultivation" section on this forum. There's a sticky called "Uncle Ben's Topping Method to get 2 or 4 MAIN Colas". I did the method to get 4 main colas. Actually, I accidentally topped a bit higher, and got 6 colas (3 large and 3 small), but the aim was for 4. Check out that thread and let me know how it goes!
-Chipp