I know a sheet of 3/4" MDF would be better and that laminating two
3/4" MDF sheets would be best, but that sort of weight impacts the bit
about having to take it apart now and then; without a chain fall, that


New Yankee workshop has plans and a show on making a sturdy, lightweight
table with retractable wheels, you may want to look at that for ideas. He
uses 1/2 inch MDF for the top and "hollow door like construction" piece
under it for support. The best part is after the mdf gets messed up it is
easily replaced, protecting the table itself. You don't need the strength
to handle the weight Norm's does, so you can make things smaller.