Well, for a wood post, I did not turn mine, but I did buy a 10 foot 4 X 4 piece of Ipe, cut it in half and set both posts in concrete. I think I have about 24 inches into the concrete. They will out live me, and no one can pull them out of the ground.... They could be turned. I guess you need to figure out how you will mount them when done. After years of residential concrete work, post brackets do work, but are not very sturdy or strong, even the H brackets that are set down into the concrete and use through bolts, which are better than the nail in types.
robo hippy