All thanks to Ed L, the post bottom to concrete issue has been solved forever. Hinges with plates the same size as the post bottom, Moisture barrier material between the hinge/post AND the hinge/concrete. Net add to vertical height about 2" so set your concrete 2.5" below the subfloor and your will never see the seam. Was used for the Mountain School Barn just completed. Kinda makes kids work of raising the bents too. Lotsa labor and material savings. Conversationally the 8x8's used in Vershire, VT ran "about" $50.00 a copy. Added paranoia relief by welding them shut after raising.