Great advice on this post Kablammo... I've had a play with these and can now make decent pot bunkers but, unless I'm doing it wrong, the process of laying out a hole for me is now going to have to completely change.
It appears that the process of creating these bunkers involves lowering the terrain from under pre-laid splines, so I guess that best practice now will be to prepare all bunkers within a fairway spline and build them all at once, as each recalculation of the fairway spline will show up where the terrain under the pots has been lowered around the bunker. I guess that you could add a 'protective fairway spline' around each bunker and lock it to prevent it from recalculating the mesh...?