Well I am a soldier discharged from the PARA's for recieving a custodial sentence for GBH and with a good ref from my CO and the army's current state i'm in the process of possible re-enlistment so you see allowances are being made !!!!!!!
At my last UNIT (teeth arm) they would very rarely kick people out for failing a CDT on the first or even second occurence. This was probably as a result of undermanning in that CEQ. I suppose if you gave it the "Im so sorry" line they'd probably let you back in.