Well reading through it all having followed the different threads with this piece, you've got a perfect form and for 1st coat, finish with it, the little imperfections add to the piece, you may or may not have removed them should you have turned it more, but as it had the crack, I'd say and this is my view, it is just fine left as you have done. For the small amount you've been turning your doing very well.
Cheers David