You won't have overdone it unless you were there kneading intensely for an hour.Aye, by hand
65% Think I was too rough with it before it came together properly, stretched it canny far.
Bulk atm, balling up at 12.30
That's quite a high hydration, when I make them like that they also pancake out overnight, but are easily reballed ready to be used. I wouldn't worry about it, should be fine.