A DOR from training because you suck vs. completing OCS but getting NPQ and trying to come back under a different I don't believe is as negative esp if they get a good endorsement from the CO.I think this guys biggest hurdle is that he DOR'd, we had an individual that tried to get back to OCS for an IDC designator, he had a great application, graduate degrees with very high GPA's, work experience, etc, etc... and the ONLY negative thing on his application was DOR, never selected by the board again.
however.... a DOR we had who wanted to go aviation did eventually get back in, took the ASTB 3 times, on the last time he had all 8's and the board picked him.