Eric,
I'm a little confused about whether you're using hardwood or plywood - I believe that expansion is less of an issue with ply - but if you can manage to laminate it that would seem like the best shot either way. That's a pretty elaborate table so why risk problems. Side note: I was also a little thrown with those plans when they went through the trouble of laminating both sides and then hardwood edged it - why not laminate the edges as well and seal it up. My thoughts
I'm a little confused about whether you're using hardwood or plywood - I believe that expansion is less of an issue with ply - but if you can manage to laminate it that would seem like the best shot either way. That's a pretty elaborate table so why risk problems. Side note: I was also a little thrown with those plans when they went through the trouble of laminating both sides and then hardwood edged it - why not laminate the edges as well and seal it up. My thoughts