An engineer definitely did NOT design this base.  The base should be a heavier iron.  The table is beautiful, but it is not a secure base.  Table wobbles to a point of uncomfortable seating.  We have asked a couple of engineers to come up with a solution to stop the wobbling.  Reason for the wobble is that is is taller than a counter height table and for a pub height, there should be perhaps another ring near the bottom.  We'll see!