I wouldnt have worried about oxygenating at 56 hours and would have transfered to a bucket to get the kit right.
At 56 hours there will still be a lot of fermenting to do, at that stage the yeast are still working on the oxygen we so carefully try to get into our worts, in my opinion a transfer at 56 hours could even perk up the yeast, just like rousing, then the yeast will continue and deal with that additional oxygen along with the remaining sugars.
Biggest issue in this is sanitation, I personally have no doubt that my sanitised buckets and tubing are more sanitry than your hairy arm, even if you have scrubbed it raw !