Haven't really BTDT, I had a 27-weeker, so NG tube, but could bottle feed poorly by her due date and pretty well 1-2 mo after that... But I think the swallow studied are a pretty good eval of anatomy; the other consideration that comes to mind (only b/c of my knowledge of when adults aspirated) would be if he has significant neuro abnormalities otherwise (like, aspiration wouldn't be the only other symptom). could you/ do you, for his own learning/experience, have him "dry nurse"? Like, suck after you've pumped and are empty? Or, if your not pumping, I imagine he enjoys a pacifier while being tube fed.