Chances of getting 18D

[KC98]

Hey all,

I heard that you are able to request your Special Forces MOS upon getting selected and attending the Q Course. Personally, I'd want to go 18D all the way! My question is, so long as I had sufficient aptitude for the occupation, what are the chances that the Army will grant my request (as I do understand that ultimately, it is up to "the needs of the Army")?

Thank You