Right now, the numbers are drawn when both of those conditions are met : Degree completed and BOTC completed (basically, when you become a commissionned officer). So, right now, people are doing PFT that joined in March (DEO) and are ahead of RMC grads from last May . You MIGHT go ahead of the few people on your BOTC (which might equate to 1 course after) but you number is NOT drawn after PFT... But even that, the AF training told us the numbers are drawn randomly...
The only time you won't have the option is if you have the aviation degree. Other than that it's pretty much mandatary from what I hear/see. On me course, I had a 1000 hrs guy that never went to Aviation College but had his commercial and his A's written.
Max