this may go thru but WL tatkal tickets are killers ...not to scare you , but they dont get priority any more over general WL tickets ...you were damn lucky to get CKWL 1 that too in this train and that too after 4 mins !!!
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i am no expert but other expert can opine on this ..the GNWL till NZM in 2ac is WL 12 ..very bright chances of that getting into RAC ...